[ 3.8.y.z extended stable ] Patch "USB: EHCI: Fix resume signalling on remote wakeup" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    USB: EHCI: Fix resume signalling on remote wakeup

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.7.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From c8798a208afabdc520a2babbcc2abbb66ee245b7 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq at ti.com>
Date: Tue, 9 Jul 2013 17:03:50 +0300
Subject: USB: EHCI: Fix resume signalling on remote wakeup

commit 47a64a13d54f6c669b00542848d5550be3d3310e upstream.

Set the ehci->resuming flag for the port we receive a remote
wakeup on so that resume signalling can be completed.

Without this, the root hub timer will not fire again to check
if the resume was completed and there will be a never-ending wait on
on the port.

This effect is only observed if the HUB IRQ IN does not come after we
have initiated the port resume.

Signed-off-by: Roger Quadros <rogerq at ti.com>
Acked-by: Alan Stern <stern at rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/usb/host/ehci-hub.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 7d06e77..f578493 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -856,6 +856,7 @@ static int ehci_hub_control (
 				ehci->reset_done[wIndex] = jiffies
 						+ msecs_to_jiffies(20);
 				usb_hcd_start_port_resume(&hcd->self, wIndex);
+				set_bit(wIndex, &ehci->resuming_ports);
 				/* check the port again */
 				mod_timer(&ehci_to_hcd(ehci)->rh_timer,
 						ehci->reset_done[wIndex]);
--
1.8.1.2