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usb: Remove OHCI useless masking/unmasking of WDH interrupt 

The OHCI driver's IRQ handler, while processing a WDH interrupt, masks
and unmasks it.  I believe this is both broken (the write may still be
posted during the donelist processing it's trying to safeguard) and
useless as this IRQ may not be reissued until it's acked (unless this
legacy code is an uncommented workaround for some chip erratum).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Benjamin Herrenschmidt 2007-12-06 13:29:46 -08:00 committed by Greg Kroah-Hartman
parent 694cc2087e
commit badef81922
1 changed files with 0 additions and 4 deletions
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4
drivers/usb/host/ohci-hcd.c
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@ -810,13 +810,9 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
}
if (ints & OHCI_INTR_WDH) {
if (HC_IS_RUNNING(hcd->state))
ohci_writel (ohci, OHCI_INTR_WDH, &regs->intrdisable);
spin_lock (&ohci->lock);
dl_done_list (ohci);
spin_unlock (&ohci->lock);
if (HC_IS_RUNNING(hcd->state))
ohci_writel (ohci, OHCI_INTR_WDH, &regs->intrenable);
}
if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {