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-rw-r--r--drivers/usb/core/devio.c7
-rw-r--r--drivers/usb/core/driver.c181
-rw-r--r--drivers/usb/core/endpoint.c4
-rw-r--r--drivers/usb/core/generic.c10
-rw-r--r--drivers/usb/core/hcd-pci.c201
-rw-r--r--drivers/usb/core/hcd.c20
-rw-r--r--drivers/usb/core/hcd.h16
-rw-r--r--drivers/usb/core/hub.c144
-rw-r--r--drivers/usb/core/message.c164
-rw-r--r--drivers/usb/core/sysfs.c49
-rw-r--r--drivers/usb/core/urb.c43
-rw-r--r--drivers/usb/core/usb.c79
-rw-r--r--drivers/usb/core/usb.h24
13 files changed, 619 insertions, 323 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index aa79280df15d..26fece124e0e 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -981,9 +981,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
return -EINVAL;
if (!uurb->buffer)
return -EINVAL;
- if (uurb->signr != 0 && (uurb->signr < SIGRTMIN ||
- uurb->signr > SIGRTMAX))
- return -EINVAL;
if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
(uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
ifnum = findintfep(ps->dev, uurb->endpoint);
@@ -1320,7 +1317,7 @@ static int get_urb32(struct usbdevfs_urb *kurb,
if (__get_user(uptr, &uurb->buffer))
return -EFAULT;
kurb->buffer = compat_ptr(uptr);
- if (__get_user(uptr, &uurb->buffer))
+ if (__get_user(uptr, &uurb->usercontext))
return -EFAULT;
kurb->usercontext = compat_ptr(uptr);
@@ -1401,8 +1398,6 @@ static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
if (copy_from_user(&ds, arg, sizeof(ds)))
return -EFAULT;
- if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
- return -EINVAL;
ps->discsignr = ds.signr;
ps->disccontext = ds.context;
return 0;
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 8c081308b0e2..98760553bc95 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -184,6 +184,20 @@ static int usb_unbind_device(struct device *dev)
return 0;
}
+/*
+ * Cancel any pending scheduled resets
+ *
+ * [see usb_queue_reset_device()]
+ *
+ * Called after unconfiguring / when releasing interfaces. See
+ * comments in __usb_queue_reset_device() regarding
+ * udev->reset_running.
+ */
+static void usb_cancel_queued_reset(struct usb_interface *iface)
+{
+ if (iface->reset_running == 0)
+ cancel_work_sync(&iface->reset_ws);
+}
/* called from driver core with dev locked */
static int usb_probe_interface(struct device *dev)
@@ -242,6 +256,7 @@ static int usb_probe_interface(struct device *dev)
mark_quiesced(intf);
intf->needs_remote_wakeup = 0;
intf->condition = USB_INTERFACE_UNBOUND;
+ usb_cancel_queued_reset(intf);
} else
intf->condition = USB_INTERFACE_BOUND;
@@ -272,6 +287,7 @@ static int usb_unbind_interface(struct device *dev)
usb_disable_interface(udev, intf);
driver->disconnect(intf);
+ usb_cancel_queued_reset(intf);
/* Reset other interface state.
* We cannot do a Set-Interface if the device is suspended or
@@ -279,9 +295,12 @@ static int usb_unbind_interface(struct device *dev)
* altsetting means creating new endpoint device entries).
* When either of these happens, defer the Set-Interface.
*/
- if (intf->cur_altsetting->desc.bAlternateSetting == 0)
- ; /* Already in altsetting 0 so skip Set-Interface */
- else if (!error && intf->dev.power.status == DPM_ON)
+ if (intf->cur_altsetting->desc.bAlternateSetting == 0) {
+ /* Already in altsetting 0 so skip Set-Interface.
+ * Just re-enable it without affecting the endpoint toggles.
+ */
+ usb_enable_interface(udev, intf, false);
+ } else if (!error && intf->dev.power.status == DPM_ON)
usb_set_interface(udev, intf->altsetting[0].
desc.bInterfaceNumber, 0);
else
@@ -380,8 +399,10 @@ void usb_driver_release_interface(struct usb_driver *driver,
if (device_is_registered(dev)) {
iface->condition = USB_INTERFACE_UNBINDING;
device_release_driver(dev);
+ } else {
+ iface->condition = USB_INTERFACE_UNBOUND;
+ usb_cancel_queued_reset(iface);
}
-
dev->driver = NULL;
usb_set_intfdata(iface, NULL);
@@ -904,7 +925,7 @@ static int usb_suspend_device(struct usb_device *udev, pm_message_t msg)
}
/* Caller has locked udev's pm_mutex */
-static int usb_resume_device(struct usb_device *udev)
+static int usb_resume_device(struct usb_device *udev, pm_message_t msg)
{
struct usb_device_driver *udriver;
int status = 0;
@@ -922,7 +943,7 @@ static int usb_resume_device(struct usb_device *udev)
udev->reset_resume = 1;
udriver = to_usb_device_driver(udev->dev.driver);
- status = udriver->resume(udev);
+ status = udriver->resume(udev, msg);
done:
dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status);
@@ -942,7 +963,8 @@ static int usb_suspend_interface(struct usb_device *udev,
if (udev->state == USB_STATE_NOTATTACHED || !is_active(intf))
goto done;
- if (intf->condition == USB_INTERFACE_UNBOUND) /* This can't happen */
+ /* This can happen; see usb_driver_release_interface() */
+ if (intf->condition == USB_INTERFACE_UNBOUND)
goto done;
driver = to_usb_driver(intf->dev.driver);
@@ -950,7 +972,7 @@ static int usb_suspend_interface(struct usb_device *udev,
status = driver->suspend(intf, msg);
if (status == 0)
mark_quiesced(intf);
- else if (!udev->auto_pm)
+ else if (!(msg.event & PM_EVENT_AUTO))
dev_err(&intf->dev, "%s error %d\n",
"suspend", status);
} else {
@@ -968,7 +990,7 @@ static int usb_suspend_interface(struct usb_device *udev,
/* Caller has locked intf's usb_device's pm_mutex */
static int usb_resume_interface(struct usb_device *udev,
- struct usb_interface *intf, int reset_resume)
+ struct usb_interface *intf, pm_message_t msg, int reset_resume)
{
struct usb_driver *driver;
int status = 0;
@@ -1092,7 +1114,7 @@ static int autosuspend_check(struct usb_device *udev, int reschedule)
if (reschedule) {
if (!timer_pending(&udev->autosuspend.timer)) {
queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
- round_jiffies_relative(suspend_time - j));
+ round_jiffies_up_relative(suspend_time - j));
}
return -EAGAIN;
}
@@ -1119,10 +1141,9 @@ static inline int autosuspend_check(struct usb_device *udev, int reschedule)
* all the interfaces which were suspended are resumed so that they remain
* in the same state as the device.
*
- * If an autosuspend is in progress (@udev->auto_pm is set), the routine
- * checks first to make sure that neither the device itself or any of its
- * active interfaces is in use (pm_usage_cnt is greater than 0). If they
- * are, the autosuspend fails.
+ * If an autosuspend is in progress the routine checks first to make sure
+ * that neither the device itself or any of its active interfaces is in use
+ * (pm_usage_cnt is greater than 0). If they are, the autosuspend fails.
*
* If the suspend succeeds, the routine recursively queues an autosuspend
* request for @udev's parent device, thereby propagating the change up
@@ -1157,7 +1178,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
udev->do_remote_wakeup = device_may_wakeup(&udev->dev);
- if (udev->auto_pm) {
+ if (msg.event & PM_EVENT_AUTO) {
status = autosuspend_check(udev, 0);
if (status < 0)
goto done;
@@ -1177,13 +1198,16 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
/* If the suspend failed, resume interfaces that did get suspended */
if (status != 0) {
+ pm_message_t msg2;
+
+ msg2.event = msg.event ^ (PM_EVENT_SUSPEND | PM_EVENT_RESUME);
while (--i >= 0) {
intf = udev->actconfig->interface[i];
- usb_resume_interface(udev, intf, 0);
+ usb_resume_interface(udev, intf, msg2, 0);
}
/* Try another autosuspend when the interfaces aren't busy */
- if (udev->auto_pm)
+ if (msg.event & PM_EVENT_AUTO)
autosuspend_check(udev, status == -EBUSY);
/* If the suspend succeeded then prevent any more URB submissions,
@@ -1213,6 +1237,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
/**
* usb_resume_both - resume a USB device and its interfaces
* @udev: the usb_device to resume
+ * @msg: Power Management message describing this state transition
*
* This is the central routine for resuming USB devices. It calls the
* the resume method for @udev and then calls the resume methods for all
@@ -1238,7 +1263,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
*
* This routine can run only in process context.
*/
-static int usb_resume_both(struct usb_device *udev)
+static int usb_resume_both(struct usb_device *udev, pm_message_t msg)
{
int status = 0;
int i;
@@ -1254,14 +1279,15 @@ static int usb_resume_both(struct usb_device *udev)
/* Propagate the resume up the tree, if necessary */
if (udev->state == USB_STATE_SUSPENDED) {
- if (udev->auto_pm && udev->autoresume_disabled) {
+ if ((msg.event & PM_EVENT_AUTO) &&
+ udev->autoresume_disabled) {
status = -EPERM;
goto done;
}
if (parent) {
status = usb_autoresume_device(parent);
if (status == 0) {
- status = usb_resume_device(udev);
+ status = usb_resume_device(udev, msg);
if (status || udev->state ==
USB_STATE_NOTATTACHED) {
usb_autosuspend_device(parent);
@@ -1284,15 +1310,16 @@ static int usb_resume_both(struct usb_device *udev)
/* We can't progagate beyond the USB subsystem,
* so if a root hub's controller is suspended
* then we're stuck. */
- status = usb_resume_device(udev);
+ status = usb_resume_device(udev, msg);
}
} else if (udev->reset_resume)
- status = usb_resume_device(udev);
+ status = usb_resume_device(udev, msg);
if (status == 0 && udev->actconfig) {
for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) {
intf = udev->actconfig->interface[i];
- usb_resume_interface(udev, intf, udev->reset_resume);
+ usb_resume_interface(udev, intf, msg,
+ udev->reset_resume);
}
}
@@ -1320,13 +1347,13 @@ static int usb_autopm_do_device(struct usb_device *udev, int inc_usage_cnt)
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 && udev->pm_usage_cnt > 0) {
if (udev->state == USB_STATE_SUSPENDED)
- status = usb_resume_both(udev);
+ status = usb_resume_both(udev, PMSG_AUTO_RESUME);
if (status != 0)
udev->pm_usage_cnt -= inc_usage_cnt;
else if (inc_usage_cnt)
udev->last_busy = jiffies;
} else if (inc_usage_cnt <= 0 && udev->pm_usage_cnt <= 0) {
- status = usb_suspend_both(udev, PMSG_SUSPEND);
+ status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
}
usb_pm_unlock(udev);
return status;
@@ -1341,6 +1368,19 @@ void usb_autosuspend_work(struct work_struct *work)
usb_autopm_do_device(udev, 0);
}
+/* usb_autoresume_work - callback routine to autoresume a USB device */
+void usb_autoresume_work(struct work_struct *work)
+{
+ struct usb_device *udev =
+ container_of(work, struct usb_device, autoresume);
+
+ /* Wake it up, let the drivers do their thing, and then put it
+ * back to sleep.
+ */
+ if (usb_autopm_do_device(udev, 1) == 0)
+ usb_autopm_do_device(udev, -1);
+}
+
/**
* usb_autosuspend_device - delayed autosuspend of a USB device and its interfaces
* @udev: the usb_device to autosuspend
@@ -1437,13 +1477,14 @@ static int usb_autopm_do_interface(struct usb_interface *intf,
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 && intf->pm_usage_cnt > 0) {
if (udev->state == USB_STATE_SUSPENDED)
- status = usb_resume_both(udev);
+ status = usb_resume_both(udev,
+ PMSG_AUTO_RESUME);
if (status != 0)
intf->pm_usage_cnt -= inc_usage_cnt;
else
udev->last_busy = jiffies;
} else if (inc_usage_cnt <= 0 && intf->pm_usage_cnt <= 0) {
- status = usb_suspend_both(udev, PMSG_SUSPEND);
+ status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
}
}
usb_pm_unlock(udev);
@@ -1492,6 +1533,45 @@ void usb_autopm_put_interface(struct usb_interface *intf)
EXPORT_SYMBOL_GPL(usb_autopm_put_interface);
/**
+ * usb_autopm_put_interface_async - decrement a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be decremented
+ *
+ * This routine does essentially the same thing as
+ * usb_autopm_put_interface(): it decrements @intf's usage counter and
+ * queues a delayed autosuspend request if the counter is <= 0. The
+ * difference is that it does not acquire the device's pm_mutex;
+ * callers must handle all synchronization issues themselves.
+ *
+ * Typically a driver would call this routine during an URB's completion
+ * handler, if no more URBs were pending.
+ *
+ * This routine can run in atomic context.
+ */
+void usb_autopm_put_interface_async(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ int status = 0;
+
+ if (intf->condition == USB_INTERFACE_UNBOUND) {
+ status = -ENODEV;
+ } else {
+ udev->last_busy = jiffies;
+ --intf->pm_usage_cnt;
+ if (udev->autosuspend_disabled || udev->autosuspend_delay < 0)
+ status = -EPERM;
+ else if (intf->pm_usage_cnt <= 0 &&
+ !timer_pending(&udev->autosuspend.timer)) {
+ queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
+ round_jiffies_up_relative(
+ udev->autosuspend_delay));
+ }
+ }
+ dev_vdbg(&intf->dev, "%s: status %d cnt %d\n",
+ __func__, status, intf->pm_usage_cnt);
+}
+EXPORT_SYMBOL_GPL(usb_autopm_put_interface_async);
+
+/**
* usb_autopm_get_interface - increment a USB interface's PM-usage counter
* @intf: the usb_interface whose counter should be incremented
*
@@ -1537,6 +1617,37 @@ int usb_autopm_get_interface(struct usb_interface *intf)
EXPORT_SYMBOL_GPL(usb_autopm_get_interface);
/**
+ * usb_autopm_get_interface_async - increment a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be incremented
+ *
+ * This routine does much the same thing as
+ * usb_autopm_get_interface(): it increments @intf's usage counter and
+ * queues an autoresume request if the result is > 0. The differences
+ * are that it does not acquire the device's pm_mutex (callers must
+ * handle all synchronization issues themselves), and it does not
+ * autoresume the device directly (it only queues a request). After a
+ * successful call, the device will generally not yet be resumed.
+ *
+ * This routine can run in atomic context.
+ */
+int usb_autopm_get_interface_async(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ int status = 0;
+
+ if (intf->condition == USB_INTERFACE_UNBOUND)
+ status = -ENODEV;
+ else if (udev->autoresume_disabled)
+ status = -EPERM;
+ else if (++intf->pm_usage_cnt > 0 && udev->state == USB_STATE_SUSPENDED)
+ queue_work(ksuspend_usb_wq, &udev->autoresume);
+ dev_vdbg(&intf->dev, "%s: status %d cnt %d\n",
+ __func__, status, intf->pm_usage_cnt);
+ return status;
+}
+EXPORT_SYMBOL_GPL(usb_autopm_get_interface_async);
+
+/**
* usb_autopm_set_interface - set a USB interface's autosuspend state
* @intf: the usb_interface whose state should be set
*
@@ -1563,6 +1674,9 @@ EXPORT_SYMBOL_GPL(usb_autopm_set_interface);
void usb_autosuspend_work(struct work_struct *work)
{}
+void usb_autoresume_work(struct work_struct *work)
+{}
+
#endif /* CONFIG_USB_SUSPEND */
/**
@@ -1595,6 +1709,7 @@ int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
/**
* usb_external_resume_device - external resume of a USB device and its interfaces
* @udev: the usb_device to resume
+ * @msg: Power Management message describing this state transition
*
* This routine handles external resume requests: ones not generated
* internally by a USB driver (autoresume) but rather coming from the user
@@ -1603,13 +1718,13 @@ int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
*
* The caller must hold @udev's device lock.
*/
-int usb_external_resume_device(struct usb_device *udev)
+int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
{
int status;
usb_pm_lock(udev);
udev->auto_pm = 0;
- status = usb_resume_both(udev);
+ status = usb_resume_both(udev, msg);
udev->last_busy = jiffies;
usb_pm_unlock(udev);
if (status == 0)
@@ -1622,7 +1737,7 @@ int usb_external_resume_device(struct usb_device *udev)
return status;
}
-int usb_suspend(struct device *dev, pm_message_t message)
+int usb_suspend(struct device *dev, pm_message_t msg)
{
struct usb_device *udev;
@@ -1641,10 +1756,10 @@ int usb_suspend(struct device *dev, pm_message_t message)
}
udev->skip_sys_resume = 0;
- return usb_external_suspend_device(udev, message);
+ return usb_external_suspend_device(udev, msg);
}
-int usb_resume(struct device *dev)
+int usb_resume(struct device *dev, pm_message_t msg)
{
struct usb_device *udev;
@@ -1656,7 +1771,7 @@ int usb_resume(struct device *dev)
*/
if (udev->skip_sys_resume)
return 0;
- return usb_external_resume_device(udev);
+ return usb_external_resume_device(udev, msg);
}
#endif /* CONFIG_PM */
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index 946fae43d622..e1710f260b4f 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -276,7 +276,7 @@ static void ep_device_release(struct device *dev)
kfree(ep_dev);
}
-int usb_create_ep_files(struct device *parent,
+int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
{
@@ -340,7 +340,7 @@ exit:
return retval;
}
-void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
+void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
{
struct ep_device *ep_dev = endpoint->ep_dev;
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 7e912f21fd36..30ecac3af15a 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -200,18 +200,18 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg)
* interfaces manually by doing a bus (or "global") suspend.
*/
if (!udev->parent)
- rc = hcd_bus_suspend(udev);
+ rc = hcd_bus_suspend(udev, msg);
/* Non-root devices don't need to do anything for FREEZE or PRETHAW */
else if (msg.event == PM_EVENT_FREEZE || msg.event == PM_EVENT_PRETHAW)
rc = 0;
else
- rc = usb_port_suspend(udev);
+ rc = usb_port_suspend(udev, msg);
return rc;
}
-static int generic_resume(struct usb_device *udev)
+static int generic_resume(struct usb_device *udev, pm_message_t msg)
{
int rc;
@@ -221,9 +221,9 @@ static int generic_resume(struct usb_device *udev)
* interfaces manually by doing a bus (or "global") resume.
*/
if (!udev->parent)
- rc = hcd_bus_resume(udev);
+ rc = hcd_bus_resume(udev, msg);
else
- rc = usb_port_resume(udev);
+ rc = usb_port_resume(udev, msg);
return rc;
}
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 5b87ae7f0a6a..507741ed4482 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -128,6 +128,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
}
pci_set_master(dev);
+ device_set_wakeup_enable(&dev->dev, 1);
retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
if (retval != 0)
@@ -191,17 +192,15 @@ EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
/**
* usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
* @dev: USB Host Controller being suspended
- * @message: semantics in flux
+ * @message: Power Management message describing this state transition
*
- * Store this function in the HCD's struct pci_driver as suspend().
+ * Store this function in the HCD's struct pci_driver as .suspend.
*/
int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
{
- struct usb_hcd *hcd;
+ struct usb_hcd *hcd = pci_get_drvdata(dev);
int retval = 0;
- int has_pci_pm;
-
- hcd = pci_get_drvdata(dev);
+ int wake, w;
/* Root hub suspend should have stopped all downstream traffic,
* and all bus master traffic. And done so for both the interface
@@ -212,8 +211,15 @@ int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
* otherwise the swsusp will save (and restore) garbage state.
*/
if (!(hcd->state == HC_STATE_SUSPENDED ||
- hcd->state == HC_STATE_HALT))
- return -EBUSY;
+ hcd->state == HC_STATE_HALT)) {
+ dev_warn(&dev->dev, "Root hub is not suspended\n");
+ retval = -EBUSY;
+ goto done;
+ }
+
+ /* We might already be suspended (runtime PM -- not yet written) */
+ if (dev->current_state != PCI_D0)
+ goto done;
if (hcd->driver->pci_suspend) {
retval = hcd->driver->pci_suspend(hcd, message);
@@ -221,49 +227,60 @@ int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
if (retval)
goto done;
}
- synchronize_irq(dev->irq);
- /* FIXME until the generic PM interfaces change a lot more, this
- * can't use PCI D1 and D2 states. For example, the confusion
- * between messages and states will need to vanish, and messages
- * will need to provide a target system state again.
- *
- * It'll be important to learn characteristics of the target state,
- * especially on embedded hardware where the HCD will often be in
- * charge of an external VBUS power supply and one or more clocks.
- * Some target system states will leave them active; others won't.
- * (With PCI, that's often handled by platform BIOS code.)
- */
+ synchronize_irq(dev->irq);
- /* even when the PCI layer rejects some of the PCI calls
- * below, HCs can try global suspend and reduce DMA traffic.
- * PM-sensitive HCDs may already have done this.
+ /* Don't fail on error to enable wakeup. We rely on pci code
+ * to reject requests the hardware can't implement, rather
+ * than coding the same thing.
*/
- has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+ wake = (hcd->state == HC_STATE_SUSPENDED &&
+ device_may_wakeup(&dev->dev));
+ w = pci_wake_from_d3(dev, wake);
+ if (w < 0)
+ wake = w;
+ dev_dbg(&dev->dev, "wakeup: %d\n", wake);
/* Downstream ports from this root hub should already be quiesced, so
* there will be no DMA activity. Now we can shut down the upstream
* link (except maybe for PME# resume signaling) and enter some PCI
* low power state, if the hardware allows.
*/
- if (hcd->state == HC_STATE_SUSPENDED) {
+ pci_disable_device(dev);
+ done:
+ return retval;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
- /* no DMA or IRQs except when HC is active */
- if (dev->current_state == PCI_D0) {
- pci_save_state(dev);
- pci_disable_device(dev);
- }
+/**
+ * usb_hcd_pci_suspend_late - suspend a PCI-based HCD after IRQs are disabled
+ * @dev: USB Host Controller being suspended
+ * @message: Power Management message describing this state transition
+ *
+ * Store this function in the HCD's struct pci_driver as .suspend_late.
+ */
+int usb_hcd_pci_suspend_late(struct pci_dev *dev, pm_message_t message)
+{
+ int retval = 0;
+ int has_pci_pm;
- if (message.event == PM_EVENT_FREEZE ||
- message.event == PM_EVENT_PRETHAW) {
- dev_dbg(hcd->self.controller, "--> no state change\n");
- goto done;
- }
+ /* We might already be suspended (runtime PM -- not yet written) */
+ if (dev->current_state != PCI_D0)
+ goto done;
- if (!has_pci_pm) {
- dev_dbg(hcd->self.controller, "--> PCI D0/legacy\n");
- goto done;
- }
+ pci_save_state(dev);
+
+ /* Don't change state if we don't need to */
+ if (message.event == PM_EVENT_FREEZE ||
+ message.event == PM_EVENT_PRETHAW) {
+ dev_dbg(&dev->dev, "--> no state change\n");
+ goto done;
+ }
+
+ has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+ if (!has_pci_pm) {
+ dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
+ } else {
/* NOTE: dev->current_state becomes nonzero only here, and
* only for devices that support PCI PM. Also, exiting
@@ -273,35 +290,16 @@ int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
retval = pci_set_power_state(dev, PCI_D3hot);
suspend_report_result(pci_set_power_state, retval);
if (retval == 0) {
- int wake = device_can_wakeup(&hcd->self.root_hub->dev);
-
- wake = wake && device_may_wakeup(hcd->self.controller);
-
- dev_dbg(hcd->self.controller, "--> PCI D3%s\n",
- wake ? "/wakeup" : "");
-
- /* Ignore these return values. We rely on pci code to
- * reject requests the hardware can't implement, rather
- * than coding the same thing.
- */
- (void) pci_enable_wake(dev, PCI_D3hot, wake);
- (void) pci_enable_wake(dev, PCI_D3cold, wake);
+ dev_dbg(&dev->dev, "--> PCI D3\n");
} else {
dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
retval);
- (void) usb_hcd_pci_resume(dev);
+ pci_restore_state(dev);
}
-
- } else if (hcd->state != HC_STATE_HALT) {
- dev_dbg(hcd->self.controller, "hcd state %d; not suspended\n",
- hcd->state);
- WARN_ON(1);
- retval = -EINVAL;
}
-done:
- if (retval == 0) {
#ifdef CONFIG_PPC_PMAC
+ if (retval == 0) {
/* Disable ASIC clocks for USB */
if (machine_is(powermac)) {
struct device_node *of_node;
@@ -311,30 +309,24 @@ done:
pmac_call_feature(PMAC_FTR_USB_ENABLE,
of_node, 0, 0);
}
-#endif
}
+#endif
+ done:
return retval;
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
+EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend_late);
/**
- * usb_hcd_pci_resume - power management resume of a PCI-based HCD
+ * usb_hcd_pci_resume_early - resume a PCI-based HCD before IRQs are enabled
* @dev: USB Host Controller being resumed
*
- * Store this function in the HCD's struct pci_driver as resume().
+ * Store this function in the HCD's struct pci_driver as .resume_early.
*/
-int usb_hcd_pci_resume(struct pci_dev *dev)
+int usb_hcd_pci_resume_early(struct pci_dev *dev)
{
- struct usb_hcd *hcd;
- int retval;
-
- hcd = pci_get_drvdata(dev);
- if (hcd->state != HC_STATE_SUSPENDED) {
- dev_dbg(hcd->self.controller,
- "can't resume, not suspended!\n");
- return 0;
- }
+ int retval = 0;
+ pci_power_t state = dev->current_state;
#ifdef CONFIG_PPC_PMAC
/* Reenable ASIC clocks for USB */
@@ -352,7 +344,7 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
* calls "standby", "suspend to RAM", and so on). There are also
* dirty cases when swsusp fakes a suspend in "shutdown" mode.
*/
- if (dev->current_state != PCI_D0) {
+ if (state != PCI_D0) {
#ifdef DEBUG
int pci_pm;
u16 pmcr;
@@ -364,8 +356,7 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
/* Clean case: power to USB and to HC registers was
* maintained; remote wakeup is easy.
*/
- dev_dbg(hcd->self.controller, "resume from PCI D%d\n",
- pmcr);
+ dev_dbg(&dev->dev, "resume from PCI D%d\n", pmcr);
} else {
/* Clean: HC lost Vcc power, D0 uninitialized
* + Vaux may have preserved port and transceiver
@@ -376,32 +367,55 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
* + after BIOS init
* + after Linux init (HCD statically linked)
*/
- dev_dbg(hcd->self.controller,
- "PCI D0, from previous PCI D%d\n",
- dev->current_state);
+ dev_dbg(&dev->dev, "resume from previous PCI D%d\n",
+ state);
}
#endif
- /* yes, ignore these results too... */
- (void) pci_enable_wake(dev, dev->current_state, 0);
- (void) pci_enable_wake(dev, PCI_D3cold, 0);
+
+ retval = pci_set_power_state(dev, PCI_D0);
} else {
/* Same basic cases: clean (powered/not), dirty */
- dev_dbg(hcd->self.controller, "PCI legacy resume\n");
+ dev_dbg(&dev->dev, "PCI legacy resume\n");
+ }
+
+ if (retval < 0)
+ dev_err(&dev->dev, "can't resume: %d\n", retval);
+ else
+ pci_restore_state(dev);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_resume_early);
+
+/**
+ * usb_hcd_pci_resume - power management resume of a PCI-based HCD
+ * @dev: USB Host Controller being resumed
+ *
+ * Store this function in the HCD's struct pci_driver as .resume.
+ */
+int usb_hcd_pci_resume(struct pci_dev *dev)
+{
+ struct usb_hcd *hcd;
+ int retval;
+
+ hcd = pci_get_drvdata(dev);
+ if (hcd->state != HC_STATE_SUSPENDED) {
+ dev_dbg(hcd->self.controller,
+ "can't resume, not suspended!\n");
+ return 0;
}
- /* NOTE: the PCI API itself is asymmetric here. We don't need to
- * pci_set_power_state(PCI_D0) since that's part of re-enabling;
- * but that won't re-enable bus mastering. Yet pci_disable_device()
- * explicitly disables bus mastering...
- */
retval = pci_enable_device(dev);
if (retval < 0) {
- dev_err(hcd->self.controller,
- "can't re-enable after resume, %d!\n", retval);
+ dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
+ retval);
return retval;
}
+
pci_set_master(dev);
- pci_restore_state(dev);
+
+ /* yes, ignore this result too... */
+ (void) pci_wake_from_d3(dev, 0);
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
@@ -413,7 +427,6 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
usb_hc_died(hcd);
}
}
-
return retval;
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index e1b42626d04d..3c711db55d86 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1010,7 +1010,7 @@ int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)
spin_lock(&hcd_urb_list_lock);
/* Check that the URB isn't being killed */
- if (unlikely(urb->reject)) {
+ if (unlikely(atomic_read(&urb->reject))) {
rc = -EPERM;
goto done;
}
@@ -1340,7 +1340,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
INIT_LIST_HEAD(&urb->urb_list);
atomic_dec(&urb->use_count);
atomic_dec(&urb->dev->urbnum);
- if (urb->reject)
+ if (atomic_read(&urb->reject))
wake_up(&usb_kill_urb_queue);
usb_put_urb(urb);
}
@@ -1444,7 +1444,7 @@ void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status)
urb->status = status;
urb->complete (urb);
atomic_dec (&urb->use_count);
- if (unlikely (urb->reject))
+ if (unlikely(atomic_read(&urb->reject)))
wake_up (&usb_kill_urb_queue);
usb_put_urb (urb);
}
@@ -1573,14 +1573,14 @@ int usb_hcd_get_frame_number (struct usb_device *udev)
#ifdef CONFIG_PM
-int hcd_bus_suspend(struct usb_device *rhdev)
+int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
{
struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self);
int status;
int old_state = hcd->state;
dev_dbg(&rhdev->dev, "bus %s%s\n",
- rhdev->auto_pm ? "auto-" : "", "suspend");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend");
if (!hcd->driver->bus_suspend) {
status = -ENOENT;
} else {
@@ -1598,14 +1598,14 @@ int hcd_bus_suspend(struct usb_device *rhdev)
return status;
}
-int hcd_bus_resume(struct usb_device *rhdev)
+int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
{
struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self);
int status;
int old_state = hcd->state;
dev_dbg(&rhdev->dev, "usb %s%s\n",
- rhdev->auto_pm ? "auto-" : "", "resume");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume");
if (!hcd->driver->bus_resume)
return -ENOENT;
if (hcd->state == HC_STATE_RUNNING)
@@ -1638,7 +1638,7 @@ static void hcd_resume_work(struct work_struct *work)
usb_lock_device(udev);
usb_mark_last_busy(udev);
- usb_external_resume_device(udev);
+ usb_external_resume_device(udev, PMSG_REMOTE_RESUME);
usb_unlock_device(udev);
}
@@ -2028,7 +2028,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);
/*-------------------------------------------------------------------------*/
-#if defined(CONFIG_USB_MON)
+#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
struct usb_mon_operations *mon_ops;
@@ -2064,4 +2064,4 @@ void usb_mon_deregister (void)
}
EXPORT_SYMBOL_GPL (usb_mon_deregister);
-#endif /* CONFIG_USB_MON */
+#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index 9465e70f4dd0..572d2cf46e8d 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -16,6 +16,8 @@
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#ifndef __USB_CORE_HCD_H
+#define __USB_CORE_HCD_H
#ifdef __KERNEL__
@@ -254,7 +256,9 @@ extern int usb_hcd_pci_probe(struct pci_dev *dev,
extern void usb_hcd_pci_remove(struct pci_dev *dev);
#ifdef CONFIG_PM
-extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t state);
+extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t msg);
+extern int usb_hcd_pci_suspend_late(struct pci_dev *dev, pm_message_t msg);
+extern int usb_hcd_pci_resume_early(struct pci_dev *dev);
extern int usb_hcd_pci_resume(struct pci_dev *dev);
#endif /* CONFIG_PM */
@@ -386,8 +390,8 @@ extern int usb_find_interface_driver(struct usb_device *dev,
#ifdef CONFIG_PM
extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
extern void usb_root_hub_lost_power(struct usb_device *rhdev);
-extern int hcd_bus_suspend(struct usb_device *rhdev);
-extern int hcd_bus_resume(struct usb_device *rhdev);
+extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
+extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
#else
static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
{
@@ -419,7 +423,7 @@ static inline void usbfs_cleanup(void) { }
/*-------------------------------------------------------------------------*/
-#if defined(CONFIG_USB_MON)
+#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
struct usb_mon_operations {
void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
@@ -461,7 +465,7 @@ static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
int status) {}
-#endif /* CONFIG_USB_MON */
+#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
/*-------------------------------------------------------------------------*/
@@ -490,3 +494,5 @@ extern struct rw_semaphore ehci_cf_port_reset_rwsem;
extern unsigned long usb_hcds_loaded;
#endif /* __KERNEL__ */
+
+#endif /* __USB_CORE_HCD_H */
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index b19cbfcd51da..94d5ee263c20 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -107,7 +107,9 @@ MODULE_PARM_DESC (blinkenlights, "true to cycle leds on hubs");
/* define initial 64-byte descriptor request timeout in milliseconds */
static int initial_descriptor_timeout = USB_CTRL_GET_TIMEOUT;
module_param(initial_descriptor_timeout, int, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(initial_descriptor_timeout, "initial 64-byte descriptor request timeout in milliseconds (default 5000 - 5.0 seconds)");
+MODULE_PARM_DESC(initial_descriptor_timeout,
+ "initial 64-byte descriptor request timeout in milliseconds "
+ "(default 5000 - 5.0 seconds)");
/*
* As of 2.6.10 we introduce a new USB device initialization scheme which
@@ -1136,8 +1138,8 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
hdev = interface_to_usbdev(intf);
if (hdev->level == MAX_TOPO_LEVEL) {
- dev_err(&intf->dev, "Unsupported bus topology: "
- "hub nested too deep\n");
+ dev_err(&intf->dev,
+ "Unsupported bus topology: hub nested too deep\n");
return -E2BIG;
}
@@ -1374,8 +1376,9 @@ static void usb_stop_pm(struct usb_device *udev)
usb_autosuspend_device(udev->parent);
usb_pm_unlock(udev);
- /* Stop any autosuspend requests already submitted */
- cancel_rearming_delayed_work(&udev->autosuspend);
+ /* Stop any autosuspend or autoresume requests already submitted */
+ cancel_delayed_work_sync(&udev->autosuspend);
+ cancel_work_sync(&udev->autoresume);
}
#else
@@ -1434,17 +1437,12 @@ void usb_disconnect(struct usb_device **pdev)
usb_disable_device(udev, 0);
usb_hcd_synchronize_unlinks(udev);
+ usb_remove_ep_devs(&udev->ep0);
usb_unlock_device(udev);
- /* Remove the device-specific files from sysfs. This must be
- * done with udev unlocked, because some of the attribute
- * routines try to acquire the device lock.
- */
- usb_remove_sysfs_dev_files(udev);
-
/* Unregister the device. The device driver is responsible
- * for removing the device files from usbfs and sysfs and for
- * de-configuring the device.
+ * for de-configuring the device and invoking the remove-device
+ * notifier chain (used by usbfs and possibly others).
*/
device_del(&udev->dev);
@@ -1476,8 +1474,8 @@ static void announce_device(struct usb_device *udev)
dev_info(&udev->dev, "New USB device found, idVendor=%04x, idProduct=%04x\n",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
- dev_info(&udev->dev, "New USB device strings: Mfr=%d, Product=%d, "
- "SerialNumber=%d\n",
+ dev_info(&udev->dev,
+ "New USB device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
udev->descriptor.iManufacturer,
udev->descriptor.iProduct,
udev->descriptor.iSerialNumber);
@@ -1542,7 +1540,7 @@ static int usb_configure_device_otg(struct usb_device *udev)
* customize to match your product.
*/
dev_info(&udev->dev,
- "can't set HNP mode; %d\n",
+ "can't set HNP mode: %d\n",
err);
bus->b_hnp_enable = 0;
}
@@ -1556,7 +1554,7 @@ static int usb_configure_device_otg(struct usb_device *udev)
* (Includes HNP test device.)
*/
if (udev->bus->b_hnp_enable || udev->bus->is_b_host) {
- err = usb_port_suspend(udev);
+ err = usb_port_suspend(udev, PMSG_SUSPEND);
if (err < 0)
dev_dbg(&udev->dev, "HNP fail, %d\n", err);
}
@@ -1635,6 +1633,10 @@ int usb_new_device(struct usb_device *udev)
{
int err;
+ /* Increment the parent's count of unsuspended children */
+ if (udev->parent)
+ usb_autoresume_device(udev->parent);
+
usb_detect_quirks(udev); /* Determine quirks */
err = usb_configure_device(udev); /* detect & probe dev/intfs */
if (err < 0)
@@ -1643,13 +1645,12 @@ int usb_new_device(struct usb_device *udev)
udev->dev.devt = MKDEV(USB_DEVICE_MAJOR,
(((udev->bus->busnum-1) * 128) + (udev->devnum-1)));
- /* Increment the parent's count of unsuspended children */
- if (udev->parent)
- usb_autoresume_device(udev->parent);
+ /* Tell the world! */
+ announce_device(udev);
/* Register the device. The device driver is responsible
- * for adding the device files to sysfs and for configuring
- * the device.
+ * for configuring the device and invoking the add-device
+ * notifier chain (used by usbfs and possibly others).
*/
err = device_add(&udev->dev);
if (err) {
@@ -1657,15 +1658,12 @@ int usb_new_device(struct usb_device *udev)
goto fail;
}
- /* put device-specific files into sysfs */
- usb_create_sysfs_dev_files(udev);
-
- /* Tell the world! */
- announce_device(udev);
+ (void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
return err;
fail:
usb_set_device_state(udev, USB_STATE_NOTATTACHED);
+ usb_stop_pm(udev);
return err;
}
@@ -1982,7 +1980,7 @@ static int check_port_resume_type(struct usb_device *udev,
*
* Returns 0 on success, else negative errno.
*/
-int usb_port_suspend(struct usb_device *udev)
+int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
{
struct usb_hub *hub = hdev_to_hub(udev->parent);
int port1 = udev->portnum;
@@ -2021,7 +2019,7 @@ int usb_port_suspend(struct usb_device *udev)
} else {
/* device has up to 10 msec to fully suspend */
dev_dbg(&udev->dev, "usb %ssuspend\n",
- udev->auto_pm ? "auto-" : "");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""));
usb_set_device_state(udev, USB_STATE_SUSPENDED);
msleep(10);
}
@@ -2045,8 +2043,8 @@ static int finish_port_resume(struct usb_device *udev)
u16 devstatus;
/* caller owns the udev device lock */
- dev_dbg(&udev->dev, "finish %sresume\n",
- udev->reset_resume ? "reset-" : "");
+ dev_dbg(&udev->dev, "%s\n",
+ udev->reset_resume ? "finish reset-resume" : "finish resume");
/* usb ch9 identifies four variants of SUSPENDED, based on what
* state the device resumes to. Linux currently won't see the
@@ -2098,8 +2096,9 @@ static int finish_port_resume(struct usb_device *udev)
NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (status)
- dev_dbg(&udev->dev, "disable remote "
- "wakeup, status %d\n", status);
+ dev_dbg(&udev->dev,
+ "disable remote wakeup, status %d\n",
+ status);
}
status = 0;
}
@@ -2140,7 +2139,7 @@ static int finish_port_resume(struct usb_device *udev)
*
* Returns 0 on success, else negative errno.
*/
-int usb_port_resume(struct usb_device *udev)
+int usb_port_resume(struct usb_device *udev, pm_message_t msg)
{
struct usb_hub *hub = hdev_to_hub(udev->parent);
int port1 = udev->portnum;
@@ -2165,7 +2164,7 @@ int usb_port_resume(struct usb_device *udev)
} else {
/* drive resume for at least 20 msec */
dev_dbg(&udev->dev, "usb %sresume\n",
- udev->auto_pm ? "auto-" : "");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""));
msleep(25);
/* Virtual root hubs can trigger on GET_PORT_STATUS to
@@ -2206,7 +2205,7 @@ static int remote_wakeup(struct usb_device *udev)
if (udev->state == USB_STATE_SUSPENDED) {
dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-");
usb_mark_last_busy(udev);
- status = usb_external_resume_device(udev);
+ status = usb_external_resume_device(udev, PMSG_REMOTE_RESUME);
}
return status;
}
@@ -2215,14 +2214,14 @@ static int remote_wakeup(struct usb_device *udev)
/* When CONFIG_USB_SUSPEND isn't set, we never suspend or resume any ports. */
-int usb_port_suspend(struct usb_device *udev)
+int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
{
return 0;
}
/* However we may need to do a reset-resume */
-int usb_port_resume(struct usb_device *udev)
+int usb_port_resume(struct usb_device *udev, pm_message_t msg)
{
struct usb_hub *hub = hdev_to_hub(udev->parent);
int port1 = udev->portnum;
@@ -2262,7 +2261,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
udev = hdev->children [port1-1];
if (udev && udev->can_submit) {
- if (!hdev->auto_pm)
+ if (!(msg.event & PM_EVENT_AUTO))
dev_dbg(&intf->dev, "port %d nyet suspended\n",
port1);
return -EBUSY;
@@ -2385,7 +2384,7 @@ void usb_ep0_reinit(struct usb_device *udev)
{
usb_disable_endpoint(udev, 0 + USB_DIR_IN);
usb_disable_endpoint(udev, 0 + USB_DIR_OUT);
- usb_enable_endpoint(udev, &udev->ep0);
+ usb_enable_endpoint(udev, &udev->ep0, true);
}
EXPORT_SYMBOL_GPL(usb_ep0_reinit);
@@ -2582,9 +2581,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
goto fail;
}
if (r) {
- dev_err(&udev->dev, "device descriptor "
- "read/%s, error %d\n",
- "64", r);
+ dev_err(&udev->dev,
+ "device descriptor read/64, error %d\n",
+ r);
retval = -EMSGSIZE;
continue;
}
@@ -2621,9 +2620,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
retval = usb_get_device_descriptor(udev, 8);
if (retval < 8) {
- dev_err(&udev->dev, "device descriptor "
- "read/%s, error %d\n",
- "8", retval);
+ dev_err(&udev->dev,
+ "device descriptor read/8, error %d\n",
+ retval);
if (retval >= 0)
retval = -EMSGSIZE;
} else {
@@ -2650,8 +2649,8 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
retval = usb_get_device_descriptor(udev, USB_DT_DEVICE_SIZE);
if (retval < (signed)sizeof(udev->descriptor)) {
- dev_err(&udev->dev, "device descriptor read/%s, error %d\n",
- "all", retval);
+ dev_err(&udev->dev, "device descriptor read/all, error %d\n",
+ retval);
if (retval >= 0)
retval = -ENOMSG;
goto fail;
@@ -2719,9 +2718,9 @@ hub_power_remaining (struct usb_hub *hub)
else
delta = 8;
if (delta > hub->mA_per_port)
- dev_warn(&udev->dev, "%dmA is over %umA budget "
- "for port %d!\n",
- delta, hub->mA_per_port, port1);
+ dev_warn(&udev->dev,
+ "%dmA is over %umA budget for port %d!\n",
+ delta, hub->mA_per_port, port1);
remaining -= delta;
}
if (remaining < 0) {
@@ -3517,3 +3516,46 @@ int usb_reset_device(struct usb_device *udev)
return ret;
}
EXPORT_SYMBOL_GPL(usb_reset_device);
+
+
+/**
+ * usb_queue_reset_device - Reset a USB device from an atomic context
+ * @iface: USB interface belonging to the device to reset
+ *
+ * This function can be used to reset a USB device from an atomic
+ * context, where usb_reset_device() won't work (as it blocks).
+ *
+ * Doing a reset via this method is functionally equivalent to calling
+ * usb_reset_device(), except for the fact that it is delayed to a
+ * workqueue. This means that any drivers bound to other interfaces
+ * might be unbound, as well as users from usbfs in user space.
+ *
+ * Corner cases:
+ *
+ * - Scheduling two resets at the same time from two different drivers
+ * attached to two different interfaces of the same device is
+ * possible; depending on how the driver attached to each interface
+ * handles ->pre_reset(), the second reset might happen or not.
+ *
+ * - If a driver is unbound and it had a pending reset, the reset will
+ * be cancelled.
+ *
+ * - This function can be called during .probe() or .disconnect()
+ * times. On return from .disconnect(), any pending resets will be
+ * cancelled.
+ *
+ * There is no no need to lock/unlock the @reset_ws as schedule_work()
+ * does its own.
+ *
+ * NOTE: We don't do any reference count tracking because it is not
+ * needed. The lifecycle of the work_struct is tied to the
+ * usb_interface. Before destroying the interface we cancel the
+ * work_struct, so the fact that work_struct is queued and or
+ * running means the interface (and thus, the device) exist and
+ * are referenced.
+ */
+void usb_queue_reset_device(struct usb_interface *iface)
+{
+ schedule_work(&iface->reset_ws);
+}
+EXPORT_SYMBOL_GPL(usb_queue_reset_device);
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 6d1048faf08e..de51667dd64d 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -18,6 +18,8 @@
#include "hcd.h" /* for usbcore internals */
#include "usb.h"
+static void cancel_async_set_config(struct usb_device *udev);
+
struct api_context {
struct completion done;
int status;
@@ -139,9 +141,9 @@ int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
dr->bRequestType = requesttype;
dr->bRequest = request;
- dr->wValue = cpu_to_le16p(&value);
- dr->wIndex = cpu_to_le16p(&index);
- dr->wLength = cpu_to_le16p(&size);
+ dr->wValue = cpu_to_le16(value);
+ dr->wIndex = cpu_to_le16(index);
+ dr->wLength = cpu_to_le16(size);
/* dbg("usb_control_msg"); */
@@ -1004,6 +1006,34 @@ int usb_clear_halt(struct usb_device *dev, int pipe)
}
EXPORT_SYMBOL_GPL(usb_clear_halt);
+static int create_intf_ep_devs(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ int i;
+
+ if (intf->ep_devs_created || intf->unregistering)
+ return 0;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; ++i)
+ (void) usb_create_ep_devs(&intf->dev, &alt->endpoint[i], udev);
+ intf->ep_devs_created = 1;
+ return 0;
+}
+
+static void remove_intf_ep_devs(struct usb_interface *intf)
+{
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ int i;
+
+ if (!intf->ep_devs_created)
+ return;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; ++i)
+ usb_remove_ep_devs(&alt->endpoint[i]);
+ intf->ep_devs_created = 0;
+}
+
/**
* usb_disable_endpoint -- Disable an endpoint by address
* @dev: the device whose endpoint is being disabled
@@ -1092,7 +1122,7 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
dev_dbg(&dev->dev, "unregistering interface %s\n",
dev_name(&interface->dev));
interface->unregistering = 1;
- usb_remove_sysfs_intf_files(interface);
+ remove_intf_ep_devs(interface);
device_del(&interface->dev);
}
@@ -1113,22 +1143,26 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
* usb_enable_endpoint - Enable an endpoint for USB communications
* @dev: the device whose interface is being enabled
* @ep: the endpoint
+ * @reset_toggle: flag to set the endpoint's toggle back to 0
*
- * Resets the endpoint toggle, and sets dev->ep_{in,out} pointers.
+ * Resets the endpoint toggle if asked, and sets dev->ep_{in,out} pointers.
* For control endpoints, both the input and output sides are handled.
*/
-void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep)
+void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep,
+ bool reset_toggle)
{
int epnum = usb_endpoint_num(&ep->desc);
int is_out = usb_endpoint_dir_out(&ep->desc);
int is_control = usb_endpoint_xfer_control(&ep->desc);
if (is_out || is_control) {
- usb_settoggle(dev, epnum, 1, 0);
+ if (reset_toggle)
+ usb_settoggle(dev, epnum, 1, 0);
dev->ep_out[epnum] = ep;
}
if (!is_out || is_control) {
- usb_settoggle(dev, epnum, 0, 0);
+ if (reset_toggle)
+ usb_settoggle(dev, epnum, 0, 0);
dev->ep_in[epnum] = ep;
}
ep->enabled = 1;
@@ -1138,17 +1172,18 @@ void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep)
* usb_enable_interface - Enable all the endpoints for an interface
* @dev: the device whose interface is being enabled
* @intf: pointer to the interface descriptor
+ * @reset_toggles: flag to set the endpoints' toggles back to 0
*
* Enables all the endpoints for the interface's current altsetting.
*/
-static void usb_enable_interface(struct usb_device *dev,
- struct usb_interface *intf)
+void usb_enable_interface(struct usb_device *dev,
+ struct usb_interface *intf, bool reset_toggles)
{
struct usb_host_interface *alt = intf->cur_altsetting;
int i;
for (i = 0; i < alt->desc.bNumEndpoints; ++i)
- usb_enable_endpoint(dev, &alt->endpoint[i]);
+ usb_enable_endpoint(dev, &alt->endpoint[i], reset_toggles);
}
/**
@@ -1235,8 +1270,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
*/
/* prevent submissions using previous endpoint settings */
- if (iface->cur_altsetting != alt)
+ if (iface->cur_altsetting != alt) {
+ remove_intf_ep_devs(iface);
usb_remove_sysfs_intf_files(iface);
+ }
usb_disable_interface(dev, iface);
iface->cur_altsetting = alt;
@@ -1271,10 +1308,11 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
* during the SETUP stage - hence EP0 toggles are "don't care" here.
* (Likewise, EP0 never "halts" on well designed devices.)
*/
- usb_enable_interface(dev, iface);
- if (device_is_registered(&iface->dev))
+ usb_enable_interface(dev, iface, true);
+ if (device_is_registered(&iface->dev)) {
usb_create_sysfs_intf_files(iface);
-
+ create_intf_ep_devs(iface);
+ }
return 0;
}
EXPORT_SYMBOL_GPL(usb_set_interface);
@@ -1334,7 +1372,6 @@ int usb_reset_configuration(struct usb_device *dev)
struct usb_interface *intf = config->interface[i];
struct usb_host_interface *alt;
- usb_remove_sysfs_intf_files(intf);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
@@ -1345,10 +1382,16 @@ int usb_reset_configuration(struct usb_device *dev)
if (!alt)
alt = &intf->altsetting[0];
+ if (alt != intf->cur_altsetting) {
+ remove_intf_ep_devs(intf);
+ usb_remove_sysfs_intf_files(intf);
+ }
intf->cur_altsetting = alt;
- usb_enable_interface(dev, intf);
- if (device_is_registered(&intf->dev))
+ usb_enable_interface(dev, intf, true);
+ if (device_is_registered(&intf->dev)) {
usb_create_sysfs_intf_files(intf);
+ create_intf_ep_devs(intf);
+ }
}
return 0;
}
@@ -1441,6 +1484,46 @@ static struct usb_interface_assoc_descriptor *find_iad(struct usb_device *dev,
return retval;
}
+
+/*
+ * Internal function to queue a device reset
+ *
+ * This is initialized into the workstruct in 'struct
+ * usb_device->reset_ws' that is launched by
+ * message.c:usb_set_configuration() when initializing each 'struct
+ * usb_interface'.
+ *
+ * It is safe to get the USB device without reference counts because
+ * the life cycle of @iface is bound to the life cycle of @udev. Then,
+ * this function will be ran only if @iface is alive (and before
+ * freeing it any scheduled instances of it will have been cancelled).
+ *
+ * We need to set a flag (usb_dev->reset_running) because when we call
+ * the reset, the interfaces might be unbound. The current interface
+ * cannot try to remove the queued work as it would cause a deadlock
+ * (you cannot remove your work from within your executing
+ * workqueue). This flag lets it know, so that
+ * usb_cancel_queued_reset() doesn't try to do it.
+ *
+ * See usb_queue_reset_device() for more details
+ */
+void __usb_queue_reset_device(struct work_struct *ws)
+{
+ int rc;
+ struct usb_interface *iface =
+ container_of(ws, struct usb_interface, reset_ws);
+ struct usb_device *udev = interface_to_usbdev(iface);
+
+ rc = usb_lock_device_for_reset(udev, iface);
+ if (rc >= 0) {
+ iface->reset_running = 1;
+ usb_reset_device(udev);
+ iface->reset_running = 0;
+ usb_unlock_device(udev);
+ }
+}
+
+
/*
* usb_set_configuration - Makes a particular device setting be current
* @dev: the device whose configuration is being updated
@@ -1560,6 +1643,9 @@ free_interfaces:
if (dev->state != USB_STATE_ADDRESS)
usb_disable_device(dev, 1); /* Skip ep0 */
+ /* Get rid of pending async Set-Config requests for this device */
+ cancel_async_set_config(dev);
+
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
@@ -1604,13 +1690,14 @@ free_interfaces:
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
- usb_enable_interface(dev, intf);
+ usb_enable_interface(dev, intf, true);
intf->dev.parent = &dev->dev;
intf->dev.driver = NULL;
intf->dev.bus = &usb_bus_type;
intf->dev.type = &usb_if_device_type;
intf->dev.groups = usb_interface_groups;
intf->dev.dma_mask = dev->dev.dma_mask;
+ INIT_WORK(&intf->reset_ws, __usb_queue_reset_device);
device_initialize(&intf->dev);
mark_quiesced(intf);
dev_set_name(&intf->dev, "%d-%s:%d.%d",
@@ -1641,17 +1728,21 @@ free_interfaces:
dev_name(&intf->dev), ret);
continue;
}
- usb_create_sysfs_intf_files(intf);
+ create_intf_ep_devs(intf);
}
usb_autosuspend_device(dev);
return 0;
}
+static LIST_HEAD(set_config_list);
+static DEFINE_SPINLOCK(set_config_lock);
+
struct set_config_request {
struct usb_device *udev;
int config;
struct work_struct work;
+ struct list_head node;
};
/* Worker routine for usb_driver_set_configuration() */
@@ -1659,14 +1750,35 @@ static void driver_set_config_work(struct work_struct *work)
{
struct set_config_request *req =
container_of(work, struct set_config_request, work);
+ struct usb_device *udev = req->udev;
+
+ usb_lock_device(udev);
+ spin_lock(&set_config_lock);
+ list_del(&req->node);
+ spin_unlock(&set_config_lock);
- usb_lock_device(req->udev);
- usb_set_configuration(req->udev, req->config);
- usb_unlock_device(req->udev);
- usb_put_dev(req->udev);
+ if (req->config >= -1) /* Is req still valid? */
+ usb_set_configuration(udev, req->config);
+ usb_unlock_device(udev);
+ usb_put_dev(udev);
kfree(req);
}
+/* Cancel pending Set-Config requests for a device whose configuration
+ * was just changed
+ */
+static void cancel_async_set_config(struct usb_device *udev)
+{
+ struct set_config_request *req;
+
+ spin_lock(&set_config_lock);
+ list_for_each_entry(req, &set_config_list, node) {
+ if (req->udev == udev)
+ req->config = -999; /* Mark as cancelled */
+ }
+ spin_unlock(&set_config_lock);
+}
+
/**
* usb_driver_set_configuration - Provide a way for drivers to change device configurations
* @udev: the device whose configuration is being updated
@@ -1698,6 +1810,10 @@ int usb_driver_set_configuration(struct usb_device *udev, int config)
req->config = config;
INIT_WORK(&req->work, driver_set_config_work);
+ spin_lock(&set_config_lock);
+ list_add(&req->node, &set_config_list);
+ spin_unlock(&set_config_lock);
+
usb_get_dev(udev);
schedule_work(&req->work);
return 0;
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 4fb65fdc9dc3..4cc2456ef3be 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -359,19 +359,19 @@ set_level(struct device *dev, struct device_attribute *attr,
strncmp(buf, on_string, len) == 0) {
udev->autosuspend_disabled = 1;
udev->autoresume_disabled = 0;
- rc = usb_external_resume_device(udev);
+ rc = usb_external_resume_device(udev, PMSG_USER_RESUME);
} else if (len == sizeof auto_string - 1 &&
strncmp(buf, auto_string, len) == 0) {
udev->autosuspend_disabled = 0;
udev->autoresume_disabled = 0;
- rc = usb_external_resume_device(udev);
+ rc = usb_external_resume_device(udev, PMSG_USER_RESUME);
} else if (len == sizeof suspend_string - 1 &&
strncmp(buf, suspend_string, len) == 0) {
udev->autosuspend_disabled = 0;
udev->autoresume_disabled = 1;
- rc = usb_external_suspend_device(udev, PMSG_SUSPEND);
+ rc = usb_external_suspend_device(udev, PMSG_USER_SUSPEND);
} else
rc = -EINVAL;
@@ -629,9 +629,6 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
struct device *dev = &udev->dev;
int retval;
- /* Unforunately these attributes cannot be created before
- * the uevent is broadcast.
- */
retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
if (retval)
goto error;
@@ -643,11 +640,7 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
retval = add_power_attributes(dev);
if (retval)
goto error;
-
- retval = usb_create_ep_files(dev, &udev->ep0, udev);
- if (retval)
- goto error;
- return 0;
+ return retval;
error:
usb_remove_sysfs_dev_files(udev);
return retval;
@@ -657,7 +650,6 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev)
{
struct device *dev = &udev->dev;
- usb_remove_ep_files(&udev->ep0);
remove_power_attributes(dev);
remove_persist_attributes(dev);
device_remove_bin_file(dev, &dev_bin_attr_descriptors);
@@ -812,28 +804,6 @@ struct attribute_group *usb_interface_groups[] = {
NULL
};
-static inline void usb_create_intf_ep_files(struct usb_interface *intf,
- struct usb_device *udev)
-{
- struct usb_host_interface *iface_desc;
- int i;
-
- iface_desc = intf->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- usb_create_ep_files(&intf->dev, &iface_desc->endpoint[i],
- udev);
-}
-
-static inline void usb_remove_intf_ep_files(struct usb_interface *intf)
-{
- struct usb_host_interface *iface_desc;
- int i;
-
- iface_desc = intf->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- usb_remove_ep_files(&iface_desc->endpoint[i]);
-}
-
int usb_create_sysfs_intf_files(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
@@ -843,26 +813,19 @@ int usb_create_sysfs_intf_files(struct usb_interface *intf)
if (intf->sysfs_files_created || intf->unregistering)
return 0;
- /* The interface string may be present in some altsettings
- * and missing in others. Hence its attribute cannot be created
- * before the uevent is broadcast.
- */
if (alt->string == NULL)
alt->string = usb_cache_string(udev, alt->desc.iInterface);
if (alt->string)
retval = device_create_file(&intf->dev, &dev_attr_interface);
- usb_create_intf_ep_files(intf, udev);
intf->sysfs_files_created = 1;
return 0;
}
void usb_remove_sysfs_intf_files(struct usb_interface *intf)
{
- struct device *dev = &intf->dev;
-
if (!intf->sysfs_files_created)
return;
- usb_remove_intf_ep_files(intf);
- device_remove_file(dev, &dev_attr_interface);
+
+ device_remove_file(&intf->dev, &dev_attr_interface);
intf->sysfs_files_created = 0;
}
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index 1f68af9db3f7..58bc5e3c2560 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -10,7 +10,6 @@
#define to_urb(d) container_of(d, struct urb, kref)
-static DEFINE_SPINLOCK(usb_reject_lock);
static void urb_destroy(struct kref *kref)
{
@@ -131,9 +130,7 @@ void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)
urb->anchor = anchor;
if (unlikely(anchor->poisoned)) {
- spin_lock(&usb_reject_lock);
- urb->reject++;
- spin_unlock(&usb_reject_lock);
+ atomic_inc(&urb->reject);
}
spin_unlock_irqrestore(&anchor->lock, flags);
@@ -565,16 +562,12 @@ void usb_kill_urb(struct urb *urb)
might_sleep();
if (!(urb && urb->dev && urb->ep))
return;
- spin_lock_irq(&usb_reject_lock);
- ++urb->reject;
- spin_unlock_irq(&usb_reject_lock);
+ atomic_inc(&urb->reject);
usb_hcd_unlink_urb(urb, -ENOENT);
wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);
- spin_lock_irq(&usb_reject_lock);
- --urb->reject;
- spin_unlock_irq(&usb_reject_lock);
+ atomic_dec(&urb->reject);
}
EXPORT_SYMBOL_GPL(usb_kill_urb);
@@ -606,9 +599,7 @@ void usb_poison_urb(struct urb *urb)
might_sleep();
if (!(urb && urb->dev && urb->ep))
return;
- spin_lock_irq(&usb_reject_lock);
- ++urb->reject;
- spin_unlock_irq(&usb_reject_lock);
+ atomic_inc(&urb->reject);
usb_hcd_unlink_urb(urb, -ENOENT);
wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);
@@ -617,14 +608,10 @@ EXPORT_SYMBOL_GPL(usb_poison_urb);
void usb_unpoison_urb(struct urb *urb)
{
- unsigned long flags;
-
if (!urb)
return;
- spin_lock_irqsave(&usb_reject_lock, flags);
- --urb->reject;
- spin_unlock_irqrestore(&usb_reject_lock, flags);
+ atomic_dec(&urb->reject);
}
EXPORT_SYMBOL_GPL(usb_unpoison_urb);
@@ -692,6 +679,26 @@ void usb_poison_anchored_urbs(struct usb_anchor *anchor)
EXPORT_SYMBOL_GPL(usb_poison_anchored_urbs);
/**
+ * usb_unpoison_anchored_urbs - let an anchor be used successfully again
+ * @anchor: anchor the requests are bound to
+ *
+ * Reverses the effect of usb_poison_anchored_urbs
+ * the anchor can be used normally after it returns
+ */
+void usb_unpoison_anchored_urbs(struct usb_anchor *anchor)
+{
+ unsigned long flags;
+ struct urb *lazarus;
+
+ spin_lock_irqsave(&anchor->lock, flags);
+ list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) {
+ usb_unpoison_urb(lazarus);
+ }
+ anchor->poisoned = 0;
+ spin_unlock_irqrestore(&anchor->lock, flags);
+}
+EXPORT_SYMBOL_GPL(usb_unpoison_anchored_urbs);
+/**
* usb_unlink_anchored_urbs - asynchronously cancel transfer requests en masse
* @anchor: anchor the requests are bound to
*
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 399e15fc5052..dcfc072630c1 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -253,7 +253,7 @@ static int usb_dev_prepare(struct device *dev)
static void usb_dev_complete(struct device *dev)
{
/* Currently used only for rebinding interfaces */
- usb_resume(dev); /* Implement eventually? */
+ usb_resume(dev, PMSG_RESUME); /* Message event is meaningless */
}
static int usb_dev_suspend(struct device *dev)
@@ -263,7 +263,7 @@ static int usb_dev_suspend(struct device *dev)
static int usb_dev_resume(struct device *dev)
{
- return usb_resume(dev);
+ return usb_resume(dev, PMSG_RESUME);
}
static int usb_dev_freeze(struct device *dev)
@@ -273,7 +273,7 @@ static int usb_dev_freeze(struct device *dev)
static int usb_dev_thaw(struct device *dev)
{
- return usb_resume(dev);
+ return usb_resume(dev, PMSG_THAW);
}
static int usb_dev_poweroff(struct device *dev)
@@ -283,7 +283,7 @@ static int usb_dev_poweroff(struct device *dev)
static int usb_dev_restore(struct device *dev)
{
- return usb_resume(dev);
+ return usb_resume(dev, PMSG_RESTORE);
}
static struct dev_pm_ops usb_device_pm_ops = {
@@ -362,7 +362,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;
dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT;
/* ep0 maxpacket comes later, from device descriptor */
- usb_enable_endpoint(dev, &dev->ep0);
+ usb_enable_endpoint(dev, &dev->ep0, true);
dev->can_submit = 1;
/* Save readable and stable topology id, distinguishing devices
@@ -402,6 +402,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
#ifdef CONFIG_PM
mutex_init(&dev->pm_mutex);
INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
+ INIT_WORK(&dev->autoresume, usb_autoresume_work);
dev->autosuspend_delay = usb_autosuspend_delay * HZ;
dev->connect_time = jiffies;
dev->active_duration = -jiffies;
@@ -513,10 +514,7 @@ EXPORT_SYMBOL_GPL(usb_put_intf);
* disconnect; in some drivers (such as usb-storage) the disconnect()
* or suspend() method will block waiting for a device reset to complete.
*
- * Returns a negative error code for failure, otherwise 1 or 0 to indicate
- * that the device will or will not have to be unlocked. (0 can be
- * returned when an interface is given and is BINDING, because in that
- * case the driver already owns the device lock.)
+ * Returns a negative error code for failure, otherwise 0.
*/
int usb_lock_device_for_reset(struct usb_device *udev,
const struct usb_interface *iface)
@@ -527,16 +525,9 @@ int usb_lock_device_for_reset(struct usb_device *udev,
return -ENODEV;
if (udev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
- if (iface) {
- switch (iface->condition) {
- case USB_INTERFACE_BINDING:
- return 0;
- case USB_INTERFACE_BOUND:
- break;
- default:
- return -EINTR;
- }
- }
+ if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+ iface->condition == USB_INTERFACE_UNBOUND))
+ return -EINTR;
while (usb_trylock_device(udev) != 0) {
@@ -550,10 +541,11 @@ int usb_lock_device_for_reset(struct usb_device *udev,
return -ENODEV;
if (udev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
- if (iface && iface->condition != USB_INTERFACE_BOUND)
+ if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+ iface->condition == USB_INTERFACE_UNBOUND))
return -EINTR;
}
- return 1;
+ return 0;
}
EXPORT_SYMBOL_GPL(usb_lock_device_for_reset);
@@ -962,8 +954,12 @@ void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in,
}
EXPORT_SYMBOL_GPL(usb_buffer_unmap_sg);
-/* format to disable USB on kernel command line is: nousb */
-__module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
+/* To disable USB, kernel command line is 'nousb' not 'usbcore.nousb' */
+#ifdef MODULE
+module_param(nousb, bool, 0444);
+#else
+core_param(nousb, nousb, bool, 0444);
+#endif
/*
* for external read access to <nousb>
@@ -975,6 +971,37 @@ int usb_disabled(void)
EXPORT_SYMBOL_GPL(usb_disabled);
/*
+ * Notifications of device and interface registration
+ */
+static int usb_bus_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (dev->type == &usb_device_type)
+ (void) usb_create_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ (void) usb_create_sysfs_intf_files(
+ to_usb_interface(dev));
+ break;
+
+ case BUS_NOTIFY_DEL_DEVICE:
+ if (dev->type == &usb_device_type)
+ usb_remove_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ usb_remove_sysfs_intf_files(to_usb_interface(dev));
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block usb_bus_nb = {
+ .notifier_call = usb_bus_notify,
+};
+
+/*
* Init
*/
static int __init usb_init(void)
@@ -991,6 +1018,9 @@ static int __init usb_init(void)
retval = bus_register(&usb_bus_type);
if (retval)
goto bus_register_failed;
+ retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
+ if (retval)
+ goto bus_notifier_failed;
retval = usb_host_init();
if (retval)
goto host_init_failed;
@@ -1025,6 +1055,8 @@ driver_register_failed:
major_init_failed:
usb_host_cleanup();
host_init_failed:
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
+bus_notifier_failed:
bus_unregister(&usb_bus_type);
bus_register_failed:
ksuspend_usb_cleanup();
@@ -1048,6 +1080,7 @@ static void __exit usb_exit(void)
usb_devio_cleanup();
usb_hub_cleanup();
usb_host_cleanup();
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
ksuspend_usb_cleanup();
}
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 9a1a45ac3add..386177867a8a 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -1,16 +1,20 @@
+#include <linux/pm.h>
+
/* Functions local to drivers/usb/core/ */
extern int usb_create_sysfs_dev_files(struct usb_device *dev);
extern void usb_remove_sysfs_dev_files(struct usb_device *dev);
extern int usb_create_sysfs_intf_files(struct usb_interface *intf);
extern void usb_remove_sysfs_intf_files(struct usb_interface *intf);
-extern int usb_create_ep_files(struct device *parent,
+extern int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev);
-extern void usb_remove_ep_files(struct usb_host_endpoint *endpoint);
+extern void usb_remove_ep_devs(struct usb_host_endpoint *endpoint);
extern void usb_enable_endpoint(struct usb_device *dev,
- struct usb_host_endpoint *ep);
+ struct usb_host_endpoint *ep, bool reset_toggle);
+extern void usb_enable_interface(struct usb_device *dev,
+ struct usb_interface *intf, bool reset_toggles);
extern void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr);
extern void usb_disable_interface(struct usb_device *dev,
struct usb_interface *intf);
@@ -42,14 +46,16 @@ extern void usb_host_cleanup(void);
#ifdef CONFIG_PM
extern int usb_suspend(struct device *dev, pm_message_t msg);
-extern int usb_resume(struct device *dev);
+extern int usb_resume(struct device *dev, pm_message_t msg);
extern void usb_autosuspend_work(struct work_struct *work);
-extern int usb_port_suspend(struct usb_device *dev);
-extern int usb_port_resume(struct usb_device *dev);
+extern void usb_autoresume_work(struct work_struct *work);
+extern int usb_port_suspend(struct usb_device *dev, pm_message_t msg);
+extern int usb_port_resume(struct usb_device *dev, pm_message_t msg);
extern int usb_external_suspend_device(struct usb_device *udev,
pm_message_t msg);
-extern int usb_external_resume_device(struct usb_device *udev);
+extern int usb_external_resume_device(struct usb_device *udev,
+ pm_message_t msg);
static inline void usb_pm_lock(struct usb_device *udev)
{
@@ -63,12 +69,12 @@ static inline void usb_pm_unlock(struct usb_device *udev)
#else
-static inline int usb_port_suspend(struct usb_device *udev)
+static inline int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
{
return 0;
}
-static inline int usb_port_resume(struct usb_device *udev)
+static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
{
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 22:59:53 +0000