Commit 0e9f480b authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Chris Ball

mmc: cd-gpio: protect against NULL context in mmc_cd_gpio_free()

Do not oops, even if mmc_cd_gpio_free() is mistakenly called on a driver
cleanup path, even though a previous call to mmc_cd_gpio_request() failed.
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
[stable@: please apply to 3.3-stable]
Cc: stable <stable@vger.kernel.org>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 0dd1bfeb
...@@ -73,6 +73,9 @@ void mmc_cd_gpio_free(struct mmc_host *host) ...@@ -73,6 +73,9 @@ void mmc_cd_gpio_free(struct mmc_host *host)
{ {
struct mmc_cd_gpio *cd = host->hotplug.handler_priv; struct mmc_cd_gpio *cd = host->hotplug.handler_priv;
if (!cd)
return;
free_irq(host->hotplug.irq, host); free_irq(host->hotplug.irq, host);
gpio_free(cd->gpio); gpio_free(cd->gpio);
kfree(cd); kfree(cd);
......
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