[3.11.y.z extended stable] Patch "net: allwinner: emac: Add missing free_irq" has been added to staging queue

[Luis Henriques]

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

    net: allwinner: emac: Add missing free_irq

to the linux-3.11.y-queue branch of the 3.11.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-3.11.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 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 5aa388225218ab7ce490e4ec65b8ad398011a963 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard at free-electrons.com>
Date: Mon, 23 Jun 2014 22:49:40 +0200
Subject: net: allwinner: emac: Add missing free_irq

commit b91113282bf44df46aba374a0b8f88a75bfd4b3f upstream.

If the mdio probe function fails in emac_open, the interrupt we just requested
isn't freed. If emac_open is called again, for example because we try to set up
the interface again, the kernel will oops because the interrupt wasn't properly
released.

Signed-off-by: Maxime Ripard <maxime.ripard at free-electrons.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/net/ethernet/allwinner/sun4i-emac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/allwinner/sun4i-emac.c b/drivers/net/ethernet/allwinner/sun4i-emac.c
index 46dfb1378c17..81576c6c31e0 100644
--- a/drivers/net/ethernet/allwinner/sun4i-emac.c
+++ b/drivers/net/ethernet/allwinner/sun4i-emac.c
@@ -726,6 +726,7 @@ static int emac_open(struct net_device *dev)

 	ret = emac_mdio_probe(dev);
 	if (ret < 0) {
+		free_irq(dev->irq, dev);
 		netdev_err(dev, "cannot probe MDIO bus\n");
 		return ret;
 	}
--
1.9.1