[3.11.y.z extended stable] Patch "mmc: sdhci-pci: Fix possibility of chip->fixes being null" has been added to staging queue

[Luis Henriques]

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

    mmc: sdhci-pci: Fix possibility of chip->fixes being null

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 753492bc9bdb0e1d79cb593c804ea363d0905510 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter at intel.com>
Date: Tue, 21 Jan 2014 09:52:39 +0200
Subject: mmc: sdhci-pci: Fix possibility of chip->fixes being null

commit 945be38caa287b177b8c17ffaae7754cab6a658f upstream.

It is possible for chip->fixes to be null.  Check before dereferencing it.

Signed-off-by: Adrian Hunter <adrian.hunter at intel.com>
Signed-off-by: Chris Ball <chris at printf.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/mmc/host/sdhci-pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 33593e7..27ae563 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -1389,7 +1389,8 @@ static struct sdhci_pci_slot *sdhci_pci_probe_slot(
 	 * from runtime suspend.  If it is not there, don't allow runtime PM.
 	 * Note sdhci_pci_add_own_cd() sets slot->cd_gpio to -EINVAL on failure.
 	 */
-	if (chip->fixes->own_cd_for_runtime_pm && !gpio_is_valid(slot->cd_gpio))
+	if (chip->fixes && chip->fixes->own_cd_for_runtime_pm &&
+	    !gpio_is_valid(slot->cd_gpio))
 		chip->allow_runtime_pm = false;

 	return slot;
--
1.8.3.2