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USB: OHCI: fix bug in controller resume 

This patch (as1063) fixes a bug in the way ohci-hcd resumes its
controllers.  It leaves the Master Interrupt Enable bit turned off.

If the root hub is resumed immediately this won't matter.  But if the
root hub is suspended (say because no devices are plugged in), it won't
ever wake up by itself.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Alan Stern 2008-04-03 11:35:26 -04:00 committed by Greg Kroah-Hartman
parent 9063ff44f0
commit 0d22f65515
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/host/ohci-pci.c
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@ -312,11 +312,13 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
static int ohci_pci_resume (struct usb_hcd *hcd)
{
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
/* FIXME: we should try to detect loss of VBUS power here */
prepare_for_handover(hcd);
ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrenable);
return 0;
}