Patch "usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED" has been added to the 3.4-stable tree

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This is a note to let you know that I've just added the patch titled

    usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED

to the 3.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-hub-use-correct-reset-for-wedged-usb3-devices-that-are-notattached.patch
and it can be found in the queue-3.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 2d51f3cd11f414c56a87dc018196b85fd50b04a4 Mon Sep 17 00:00:00 2001
From: Julius Werner <jwerner@xxxxxxxxxxxx>
Date: Thu, 7 Nov 2013 10:59:14 -0800
Subject: usb: hub: Use correct reset for wedged USB3 devices that are NOTATTACHED

From: Julius Werner <jwerner@xxxxxxxxxxxx>

commit 2d51f3cd11f414c56a87dc018196b85fd50b04a4 upstream.

This patch adds a check for USB_STATE_NOTATTACHED to the
hub_port_warm_reset_required() workaround for ports that end up in
Compliance Mode in hub_events() when trying to decide which reset
function to use. Trying to call usb_reset_device() with a NOTATTACHED
device will just fail and leave the port broken.

Signed-off-by: Julius Werner <jwerner@xxxxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/core/hub.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3891,8 +3891,9 @@ static void hub_events(void)
 					hub->hdev->children[i - 1];
 
 				dev_dbg(hub_dev, "warm reset port %d\n", i);
-				if (!udev || !(portstatus &
-						USB_PORT_STAT_CONNECTION)) {
+				if (!udev ||
+				    !(portstatus & USB_PORT_STAT_CONNECTION) ||
+				    udev->state == USB_STATE_NOTATTACHED) {
 					status = hub_port_reset(hub, i,
 							NULL, HUB_BH_RESET_TIME,
 							true);


Patches currently in stable-queue which might be from jwerner@xxxxxxxxxxxx are

queue-3.4/usb-hub-use-correct-reset-for-wedged-usb3-devices-that-are-notattached.patch
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