[PATCH] USB: OHCI irq tweak

Evidently there are some boards which care a lot about this, but
as a rule it's been hard to notice.

OHCI_INTR_RD wasn't always cleared in the ohci irq handler.  On some
systems this means certain remote wakeup scenarios could seem to hang
(in an interrupt storm, RD never clearing).

From: "William Morrow" <William.Morrow@amd.com>
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index ddaa9c8..6efb69f 100644 (file)
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -719,6 +719,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd, struct pt_regs *ptregs)
 
        if (ints & OHCI_INTR_RD) {
                ohci_vdbg (ohci, "resume detect\n");
+               ohci_writel (ohci, OHCI_INTR_RD, &regs->intrstatus);
                if (hcd->state != HC_STATE_QUIESCING)
                        schedule_work(&ohci->rh_resume);
        }