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leds-gpio: fix possible crash on OF device unbinding

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If there are leds present in the OF tree, but the GPIOs for (some) of
them are unavailable, led_data doesn't get populated with correct
devices. Then, on device unbinding, one can crash the kernel.

Workaround this by setting led->gpio to invalid value early.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Dmitry Eremin-Solenikov 2009-11-16 01:48:32 +03:00 committed by Richard Purdie
parent 716bdf1874
commit 0b4634fce1
1 changed files with 2 additions and 0 deletions
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2
drivers/leds/leds-gpio.c
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@ -78,6 +78,8 @@ static int __devinit create_gpio_led(const struct gpio_led *template,
{ {
int ret, state; int ret, state;
led_dat->gpio = -1;
/* skip leds that aren't available */ /* skip leds that aren't available */
if (!gpio_is_valid(template->gpio)) { if (!gpio_is_valid(template->gpio)) {
printk(KERN_INFO "Skipping unavailable LED gpio %d (%s)\n", printk(KERN_INFO "Skipping unavailable LED gpio %d (%s)\n",