[3.5.y.z extended stable] Patch "can: flexcan: flexcan_open(): fix error path if flexcan_chip_start()" has been added to staging queue

[Luis Henriques]

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

    can: flexcan: flexcan_open(): fix error path if flexcan_chip_start()

to the linux-3.5.y-queue branch of the 3.5.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-3.5.y-queue

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

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From f59094717abfc755e3b5c2ac3290b3df702145cc Mon Sep 17 00:00:00 2001
From: Marc Kleine-Budde <mkl at pengutronix.de>
Date: Fri, 28 Feb 2014 14:52:01 +0100
Subject: can: flexcan: flexcan_open(): fix error path if flexcan_chip_start()
 fails

commit 7e9e148af01ef388efb6e2490805970be4622792 upstream.

If flexcan_chip_start() in flexcan_open() fails, the interrupt is not freed,
this patch adds the missing cleanup.

Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>
[ luis: backported to 3.5: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/can/flexcan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 95109eb..8a5911f 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -813,12 +813,15 @@ static int flexcan_open(struct net_device *dev)
 	/* start chip and queuing */
 	err = flexcan_chip_start(dev);
 	if (err)
-		goto out_close;
+		goto out_free_irq;
+
 	napi_enable(&priv->napi);
 	netif_start_queue(dev);

 	return 0;

+ out_free_irq:
+	free_irq(dev->irq, dev);
  out_close:
 	close_candev(dev);
  out:
--
1.9.0