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Subject[PATCH 3.16.y-ckt 095/168] Revert "xhci: clear root port wake on bits if controller isn't wake-up capable"
Date
3.16.7-ckt3 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lu Baolu <baolu.lu@linux.intel.com>

commit 9b41ebd3cf0f68d8cad779d3eeba336f78262e43 upstream.

commit ff8cbf250b44 ("xhci: clear root port wake on bits if controller isn't")
can cause device detection error if runtime PM is enabled, and S3 wake
is disabled. Revert it.
https://bugzilla.kernel.org/show_bug.cgi?id=85701

This commit got into stable and should be reverted from there as well.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reported-by: Dmitry Nezhevenko <dion@inhex.net>
[Mathias Nyman: reword commit message]
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
drivers/usb/host/xhci-hub.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 69aece31143a..64f0ddac957f 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -22,7 +22,6 @@


#include <linux/slab.h>
-#include <linux/device.h>
#include <asm/unaligned.h>

#include "xhci.h"
@@ -1142,9 +1141,7 @@ 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
- && device_may_wakeup(hcd->self.controller)) {
-
+ if (hcd->self.root_hub->do_remote_wakeup) {
if (t1 & PORT_CONNECT) {
t2 |= PORT_WKOC_E | PORT_WKDISC_E;
t2 &= ~PORT_WKCONN_E;
--
2.1.3


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