[4.2.y-ckt stable] Patch "[media] lirc_imon: do not leave imon_probe() with mutex held" has been added to the 4.2.y-ckt tree

[Kamal Mostafa]

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

    [media] lirc_imon: do not leave imon_probe() with mutex held

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt3.

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

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

---8<------------------------------------------------------------

>From d33721231b7c688aa21f56533255fbfc10960b88 Mon Sep 17 00:00:00 2001
From: Alexey Khoroshilov <khoroshilov at ispras.ru>
Date: Sat, 14 Nov 2015 16:17:56 -0200
Subject: [media] lirc_imon: do not leave imon_probe() with mutex held

commit b833d0df943d70682e288c38c96b8e7bfff4023a upstream.

Commit af8a819a2513 ("[media] lirc_imon: simplify error handling code")
lost mutex_unlock(&context->ctx_lock), so imon_probe() exits with
the context->ctx_lock mutex acquired.

The patch adds mutex_unlock(&context->ctx_lock) back.

Found by Linux Driver Verification project (linuxtesting.org).

Fixes: af8a819a2513 ("[media] lirc_imon: simplify error handling code")

Signed-off-by: Alexey Khoroshilov <khoroshilov at ispras.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab at osg.samsung.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/staging/media/lirc/lirc_imon.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/media/lirc/lirc_imon.c b/drivers/staging/media/lirc/lirc_imon.c
index 62ec9f7..45b6443 100644
--- a/drivers/staging/media/lirc/lirc_imon.c
+++ b/drivers/staging/media/lirc/lirc_imon.c
@@ -885,12 +885,14 @@ static int imon_probe(struct usb_interface *interface,
 		vendor, product, ifnum, usbdev->bus->busnum, usbdev->devnum);

 	/* Everything went fine. Just unlock and return retval (with is 0) */
+	mutex_unlock(&context->ctx_lock);
 	goto driver_unlock;

 unregister_lirc:
 	lirc_unregister_driver(driver->minor);

 free_tx_urb:
+	mutex_unlock(&context->ctx_lock);
 	usb_free_urb(tx_urb);

 free_rx_urb:
--
1.9.1