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

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

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable <stable@vger.kernel.org> # 3.11+
Signed-off-by: Chris Ball <chris@printf.net>
This commit is contained in:
Adrian Hunter 2014-01-21 09:52:39 +02:00 committed by Chris Ball
parent 77a0122e08
commit 945be38caa
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/host/sdhci-pci.c
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@ -1378,7 +1378,8 @@ 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;