diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2013-03-21 12:48:42 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-21 15:00:18 -0700 |
| commit | 417c765af914106f5e76c4e0181dd555fe6a89a0 (patch) | |
| tree | 8234b26bc9dd1703124d49106b49e8fb0bfce3f7 | |
| parent | 29727f3bc2e691d59c521ff09b4d59a743b5d9a3 (diff) | |
USB: EHCI: fix up incorrect merge resolution
This patch (as1671) fixes up an incorrect resolution of a merge
conflict between Greg KH's usb-linus branch and his usb-next branch.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/ehci-timer.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-timer.c b/drivers/usb/host/ehci-timer.c index dca8fc42b8d7..e7363332887e 100644 --- a/drivers/usb/host/ehci-timer.c +++ b/drivers/usb/host/ehci-timer.c @@ -297,6 +297,15 @@ static void ehci_iaa_watchdog(struct ehci_hcd *ehci) { u32 cmd, status; + /* + * Lost IAA irqs wedge things badly; seen first with a vt8235. + * So we need this watchdog, but must protect it against both + * (a) SMP races against real IAA firing and retriggering, and + * (b) clean HC shutdown, when IAA watchdog was pending. + */ + if (ehci->rh_state != EHCI_RH_RUNNING) + return; + /* If we get here, IAA is *REALLY* late. It's barely * conceivable that the system is so busy that CMD_IAAD * is still legitimately set, so let's be sure it's |