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| author | Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | 2009-11-16 01:48:32 +0300 |
|---|---|---|
| committer | Richard Purdie <rpurdie@linux.intel.com> | 2009-11-16 11:50:42 +0000 |
| commit | 0b4634fce1f3f7028421630260d54093276db490 (patch) | |
| tree | 0925911860ea11673590846fffa55c1cd2d43fd7 | |
| parent | 716bdf1874647196ac16dd2a1ad359d88844795a (diff) | |
| download | blackbird-op-linux-0b4634fce1f3f7028421630260d54093276db490.tar.gz blackbird-op-linux-0b4634fce1f3f7028421630260d54093276db490.zip | |
leds-gpio: fix possible crash on OF device unbinding
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>
| -rw-r--r-- | drivers/leds/leds-gpio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 7467980b8cf9..e5225d28f392 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -78,6 +78,8 @@ static int __devinit create_gpio_led(const struct gpio_led *template, { int ret, state; + led_dat->gpio = -1; + /* skip leds that aren't available */ if (!gpio_is_valid(template->gpio)) { printk(KERN_INFO "Skipping unavailable LED gpio %d (%s)\n", |
