diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2014-06-24 17:14:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-24 12:29:35 -0400 |
| commit | ff8cbf250b448aac35589f6075082c3fcad8a8fe (patch) | |
| tree | a293dba0617be0258286eaf58405708892ed4b11 /drivers/usb/host/xhci-hub.c | |
| parent | 3213b151387df0b95f4eada104f68eb1c1409cb3 (diff) | |
xhci: clear root port wake on bits if controller isn't wake-up capable
When xHCI PCI host is suspended, if do_wakeup is false in xhci_pci_suspend,
xhci_bus_suspend needs to clear all root port wake on bits. Otherwise some Intel
platforms may get a spurious wakeup, even if PCI PME# is disabled.
This patch should be back-ported to kernels as old as 2.6.37, that
contains the commit 9777e3ce907d4cb5a513902a87ecd03b52499569
"USB: xHCI: bus power management implementation".
Cc: stable@vger.kernel.org # 2.6.37
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 2b998c60faf..aa79e874904 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -22,6 +22,7 @@ #include <linux/slab.h> +#include <linux/device.h> #include <asm/unaligned.h> #include "xhci.h" @@ -1139,7 +1140,9 @@ int xhci_bus_suspend(struct usb_hcd *hcd) * including the USB 3.0 roothub, but only if CONFIG_PM_RUNTIME * is enabled, so also enable remote wake here. */ - if (hcd->self.root_hub->do_remote_wakeup) { + if (hcd->self.root_hub->do_remote_wakeup + && device_may_wakeup(hcd->self.controller)) { + if (t1 & PORT_CONNECT) { t2 |= PORT_WKOC_E | PORT_WKDISC_E; t2 &= ~PORT_WKCONN_E; |