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authorAnant Thazhemadam <anant.thazhemadam@gmail.com>2021-03-27 04:02:49 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-03-28 13:41:27 +0200
commitf5ffdd3b7554158ec5be6ab28a48751d1d87d0cc (patch)
tree4d4008c97a46d364676d3c6d43b7a15031730526 /drivers/usb/misc
parentc21161e40ee94486f7db701f9b4d3f9c25763e8c (diff)
downloadlinux-f5ffdd3b7554158ec5be6ab28a48751d1d87d0cc.tar.bz2
usb: misc: ehset: update to use the usb_control_msg_{send|recv}() API
The newer usb_control_msg_{send|recv}() API ensures that a short read is treated as an error, data can be used off the stack, and raw usb pipes need not be created in the calling functions. For this reason, instances of usb_control_msg() have been replaced with usb_control_msg_{recv|send}() appropriately. Now, we also test for a short device descriptor (which USB core should already have fetched if you get to probe this driver), but which wasn't verified again here before. Reviewed-by: Peter Chen <peter.chen@nxp.com> Reviewed-by: Johan Hovold <johan@kernel.org> Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com> Link: https://lore.kernel.org/r/20210326223251.753952-2-anant.thazhemadam@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc')
-rw-r--r--drivers/usb/misc/ehset.c76
1 files changed, 32 insertions, 44 deletions
diff --git a/drivers/usb/misc/ehset.c b/drivers/usb/misc/ehset.c
index 2752e1f4f4d0..f87890f9cd26 100644
--- a/drivers/usb/misc/ehset.c
+++ b/drivers/usb/misc/ehset.c
@@ -24,68 +24,57 @@ static int ehset_probe(struct usb_interface *intf,
int ret = -EINVAL;
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_device *hub_udev = dev->parent;
- struct usb_device_descriptor *buf;
+ struct usb_device_descriptor buf;
u8 portnum = dev->portnum;
u16 test_pid = le16_to_cpu(dev->descriptor.idProduct);
switch (test_pid) {
case TEST_SE0_NAK_PID:
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_TEST,
- (USB_TEST_SE0_NAK << 8) | portnum,
- NULL, 0, 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_TEST,
+ (USB_TEST_SE0_NAK << 8) | portnum,
+ NULL, 0, 1000, GFP_KERNEL);
break;
case TEST_J_PID:
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_TEST,
- (USB_TEST_J << 8) | portnum,
- NULL, 0, 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_TEST,
+ (USB_TEST_J << 8) | portnum, NULL, 0,
+ 1000, GFP_KERNEL);
break;
case TEST_K_PID:
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_TEST,
- (USB_TEST_K << 8) | portnum,
- NULL, 0, 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_TEST,
+ (USB_TEST_K << 8) | portnum, NULL, 0,
+ 1000, GFP_KERNEL);
break;
case TEST_PACKET_PID:
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_TEST,
- (USB_TEST_PACKET << 8) | portnum,
- NULL, 0, 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_TEST,
+ (USB_TEST_PACKET << 8) | portnum,
+ NULL, 0, 1000, GFP_KERNEL);
break;
case TEST_HS_HOST_PORT_SUSPEND_RESUME:
/* Test: wait for 15secs -> suspend -> 15secs delay -> resume */
msleep(15 * 1000);
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_SUSPEND, portnum,
- NULL, 0, 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
+ portnum, NULL, 0, 1000, GFP_KERNEL);
if (ret < 0)
break;
msleep(15 * 1000);
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_CLEAR_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_SUSPEND, portnum,
- NULL, 0, 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_CLEAR_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_SUSPEND,
+ portnum, NULL, 0, 1000, GFP_KERNEL);
break;
case TEST_SINGLE_STEP_GET_DEV_DESC:
/* Test: wait for 15secs -> GetDescriptor request */
msleep(15 * 1000);
- buf = kmalloc(USB_DT_DEVICE_SIZE, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
- USB_DT_DEVICE << 8, 0,
- buf, USB_DT_DEVICE_SIZE,
- USB_CTRL_GET_TIMEOUT);
- kfree(buf);
+ ret = usb_control_msg_recv(dev, 0, USB_REQ_GET_DESCRIPTOR,
+ USB_DIR_IN, USB_DT_DEVICE << 8, 0,
+ &buf, USB_DT_DEVICE_SIZE,
+ USB_CTRL_GET_TIMEOUT, GFP_KERNEL);
break;
case TEST_SINGLE_STEP_SET_FEATURE:
/*
@@ -100,11 +89,10 @@ static int ehset_probe(struct usb_interface *intf,
break;
}
- ret = usb_control_msg(hub_udev, usb_sndctrlpipe(hub_udev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT,
- USB_PORT_FEAT_TEST,
- (6 << 8) | portnum,
- NULL, 0, 60 * 1000);
+ ret = usb_control_msg_send(hub_udev, 0, USB_REQ_SET_FEATURE,
+ USB_RT_PORT, USB_PORT_FEAT_TEST,
+ (6 << 8) | portnum, NULL, 0,
+ 60 * 1000, GFP_KERNEL);
break;
default:
@@ -112,7 +100,7 @@ static int ehset_probe(struct usb_interface *intf,
__func__, test_pid);
}
- return (ret < 0) ? ret : 0;
+ return ret;
}
static void ehset_disconnect(struct usb_interface *intf)