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USB: EHCI: add need_io_watchdog flag to ehci_hcd

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Basically the io watchdog is only useful for those quirk HCDs. For most
good ones, it only brings unnecessary wakeups.  At least, I know the
Intel EHCI HCDs should turn off the flag.

Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alek Du
2009-07-13 17:30:41 +08:00
committed by Greg Kroah-Hartman
parent 4d155eb5f5
commit 403dbd3673
3 changed files with 10 additions and 0 deletions
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3
drivers/usb/host/ehci-pci.c
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@@ -129,6 +129,9 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
return retval;
switch (pdev->vendor) {
case PCI_VENDOR_ID_INTEL:
ehci->need_io_watchdog = 0;
break;
case PCI_VENDOR_ID_TDI:
if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
hcd->has_tt = 1;