Merge tag 'for-usb-linus-2013-09-23' of git://git.kernel.org/pub/scm/linux/kernel/git/sarah/xhci into usb-linus

Sarah writes:

xhci: Bug fixes for 3.12.

Hi Greg,

Here's five bug fixes for 3.12.

The first two bugs fix issues with the command cancellation handling,
which can lead to oopses or the xHCI driver attempting to handle
previously-completed transfers.  People have been running into oopses
and odd behavior with command cancellation for a couple kernel releases,
so they're marked for stable.

The third patch fixes an issue with USB remote wakeup under xHCI that
can only be reproduced under ChromeOS.  As discussed, this fix is not
urgent, and isn't marked for stable.

The fourth patch fixes a race condition between URB cancellation and
userspace clearing an endpoint stall.  The fifth patch removes some
annoying dmesg spam when a USB 3.0 device is disconnected, by avoiding
sending a Set SEL request.

Sarah Sharp

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index dde4c83516a1..e6b682c6c236 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3426,6 +3426,9 @@ static int usb_req_set_sel(struct usb_device *udev, enum usb3_link_state state)
         unsigned long long u2_pel;
         int ret;
 
+        if (udev->state != USB_STATE_CONFIGURED)
+                return 0;
+
         /* Convert SEL and PEL stored in ns to us */
         u1_sel = DIV_ROUND_UP(udev->u1_params.sel, 1000);
         u1_pel = DIV_ROUND_UP(udev->u1_params.pel, 1000);