diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2009-02-13 23:41:12 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-17 16:56:31 -0800 |
| commit | 3494252d5644993f407a45f01c3e8ad5ae38f93c (patch) | |
| tree | 01821aeeb26febe7da71ff6968eaed5b28e4b4f7 /drivers/usb/host | |
| parent | e78ac4b9deb8f36d8c828b6d91232960f109d951 (diff) | |
| download | op-kernel-dev-3494252d5644993f407a45f01c3e8ad5ae38f93c.zip op-kernel-dev-3494252d5644993f407a45f01c3e8ad5ae38f93c.tar.gz | |
USB/PCI: Fix resume breakage of controllers behind cardbus bridges
If a USB PCI controller is behind a cardbus bridge, we are trying to
restore its configuration registers too early, before the cardbus
bridge is operational. To fix this, call pci_restore_state() from
usb_hcd_pci_resume() and remove usb_hcd_pci_resume_early() which is
no longer necessary (the configuration spaces of USB controllers that
are not behind cardbus bridges will be restored by the PCI PM core
with interrupts disabled anyway).
This patch fixes the regression from 2.6.28 tracked as
http://bugzilla.kernel.org/show_bug.cgi?id=12659
[ Side note: the proper long-term fix is probably to just force the
unplug event at suspend time instead of doing a plug/unplug at resume
time, but this patch is fine regardless - Linus ]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-pci.c | 1 | ||||
| -rw-r--r-- | drivers/usb/host/ohci-pci.c | 1 | ||||
| -rw-r--r-- | drivers/usb/host/uhci-hcd.c | 1 |
3 files changed, 0 insertions, 3 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index bb21fb0..abb9a77 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -432,7 +432,6 @@ static struct pci_driver ehci_pci_driver = { #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, - .resume_early = usb_hcd_pci_resume_early, .resume = usb_hcd_pci_resume, #endif .shutdown = usb_hcd_pci_shutdown, diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c index 5d625c3..f9961b4 100644 --- a/drivers/usb/host/ohci-pci.c +++ b/drivers/usb/host/ohci-pci.c @@ -487,7 +487,6 @@ static struct pci_driver ohci_pci_driver = { #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, - .resume_early = usb_hcd_pci_resume_early, .resume = usb_hcd_pci_resume, #endif diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c index 944f7e0..cf5e4cf 100644 --- a/drivers/usb/host/uhci-hcd.c +++ b/drivers/usb/host/uhci-hcd.c @@ -942,7 +942,6 @@ static struct pci_driver uhci_pci_driver = { #ifdef CONFIG_PM .suspend = usb_hcd_pci_suspend, - .resume_early = usb_hcd_pci_resume_early, .resume = usb_hcd_pci_resume, #endif /* PM */ }; |
