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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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drivers/usb/host/ehci.h
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@@ -126,6 +126,7 @@ struct ehci_hcd { /* one per controller */
unsigned big_endian_mmio:1;
unsigned big_endian_desc:1;
unsigned has_amcc_usb23:1;
unsigned need_io_watchdog:1;
/* required for usb32 quirk */
#define OHCI_CTRL_HCFS (3 << 6)