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: Guennadi Liakhovetski <g.liakhovetski@gmx.de> [stable@: please apply to 3.3-stable] Cc: stable <stable@vger.kernel.org> Signed-off-by: Chris Ball <cjb@laptop.org>
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@ -73,6 +73,9 @@ void mmc_cd_gpio_free(struct mmc_host *host)
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{
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struct mmc_cd_gpio *cd = host->hotplug.handler_priv;
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if (!cd)
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return;
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free_irq(host->hotplug.irq, host);
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gpio_free(cd->gpio);
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kfree(cd);
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