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

drivers/mmc/core/cd-gpio.c

+3 −0
Original line number Diff line number Diff line
@@ -73,6 +73,9 @@ void mmc_cd_gpio_free(struct mmc_host *host) 
{

	struct mmc_cd_gpio *cd = host->hotplug.handler_priv;



	if (!cd)

		return;



	free_irq(host->hotplug.irq, host);

	gpio_free(cd->gpio);

	kfree(cd);