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>

diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index d0360f6..b0e2275 100644 (file)
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -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;
 }