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 3.12-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-3.12 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
@@ -4836,8 +4836,9 @@ static void hub_events(void)
hub->ports[i - 1]->child;
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-3.12/usb-hub-use-correct-reset-for-wedged-usb3-devices-that-are-notattached.patch
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