diff options
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 53 |
1 files changed, 40 insertions, 13 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index bf10e9c4195e..42a436478b78 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -818,12 +818,12 @@ static int usb_register_bus(struct usb_bus *bus) set_bit (busnum, busmap.busmap); bus->busnum = busnum; - bus->dev = device_create(usb_host_class, bus->controller, MKDEV(0, 0), - "usb_host%d", busnum); + bus->dev = device_create_drvdata(usb_host_class, bus->controller, + MKDEV(0, 0), bus, + "usb_host%d", busnum); result = PTR_ERR(bus->dev); if (IS_ERR(bus->dev)) goto error_create_class_dev; - dev_set_drvdata(bus->dev, bus); /* Add it to the local list of buses */ list_add (&bus->bus_list, &usb_bus_list); @@ -924,6 +924,15 @@ static int register_root_hub(struct usb_hcd *hcd) return retval; } +void usb_enable_root_hub_irq (struct usb_bus *bus) +{ + struct usb_hcd *hcd; + + hcd = container_of (bus, struct usb_hcd, self); + if (hcd->driver->hub_irq_enable && hcd->state != HC_STATE_HALT) + hcd->driver->hub_irq_enable (hcd); +} + /*-------------------------------------------------------------------------*/ @@ -1684,19 +1693,30 @@ EXPORT_SYMBOL_GPL(usb_bus_start_enum); irqreturn_t usb_hcd_irq (int irq, void *__hcd) { struct usb_hcd *hcd = __hcd; - int start = hcd->state; + unsigned long flags; + irqreturn_t rc; - if (unlikely(start == HC_STATE_HALT || - !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) - return IRQ_NONE; - if (hcd->driver->irq (hcd) == IRQ_NONE) - return IRQ_NONE; + /* IRQF_DISABLED doesn't work correctly with shared IRQs + * when the first handler doesn't use it. So let's just + * assume it's never used. + */ + local_irq_save(flags); - set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); + if (unlikely(hcd->state == HC_STATE_HALT || + !test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))) { + rc = IRQ_NONE; + } else if (hcd->driver->irq(hcd) == IRQ_NONE) { + rc = IRQ_NONE; + } else { + set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); + + if (unlikely(hcd->state == HC_STATE_HALT)) + usb_hc_died(hcd); + rc = IRQ_HANDLED; + } - if (unlikely(hcd->state == HC_STATE_HALT)) - usb_hc_died (hcd); - return IRQ_HANDLED; + local_irq_restore(flags); + return rc; } /*-------------------------------------------------------------------------*/ @@ -1860,6 +1880,13 @@ int usb_add_hcd(struct usb_hcd *hcd, /* enable irqs just before we start the controller */ if (hcd->driver->irq) { + + /* IRQF_DISABLED doesn't work as advertised when used together + * with IRQF_SHARED. As usb_hcd_irq() will always disable + * interrupts we can remove it here. + */ + irqflags &= ~IRQF_DISABLED; + snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", hcd->driver->description, hcd->self.busnum); if ((retval = request_irq(irqnum, &usb_hcd_irq, irqflags, |