Commit 88ed9fd5 authored by Michael Opdenacker's avatar Michael Opdenacker Committed by Greg Kroah-Hartman

usb/hcd: remove unnecessary local_irq_save

Remove the use of local_irq_save() and IRQF_DISABLED, no longer needed since
interrupt handlers are always run with interrupts disabled on the
current CPU.

Tested successfully with 3.12.0-rc4 on my PC. Didn't find
any issue because of this change.
Signed-off-by: default avatarMichael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a393a807
......@@ -2331,15 +2331,8 @@ EXPORT_SYMBOL_GPL(usb_bus_start_enum);
irqreturn_t usb_hcd_irq (int irq, void *__hcd)
{
struct usb_hcd *hcd = __hcd;
unsigned long flags;
irqreturn_t rc;
/* 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);
if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd)))
rc = IRQ_NONE;
else if (hcd->driver->irq(hcd) == IRQ_NONE)
......@@ -2347,7 +2340,6 @@ irqreturn_t usb_hcd_irq (int irq, void *__hcd)
else
rc = IRQ_HANDLED;
local_irq_restore(flags);
return rc;
}
EXPORT_SYMBOL_GPL(usb_hcd_irq);
......@@ -2554,13 +2546,6 @@ static int usb_hcd_request_irqs(struct usb_hcd *hcd,
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.
*/
if (irqflags & IRQF_SHARED)
irqflags &= ~IRQF_DISABLED;
snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d",
hcd->driver->description, hcd->self.busnum);
retval = request_irq(irqnum, &usb_hcd_irq, irqflags,
......
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