On Mon, Jun 15, 2015 at 2:03 AM, Daniel Mack <daniel@xxxxxxxxxx> wrote: > On 06/15/2015 10:56 AM, Matt Ranostay wrote: >> On Mon, Jun 15, 2015 at 1:15 AM, Jacek Anaszewski >> <j.anaszewski@xxxxxxxxxxx> wrote: > >>>> + error = devm_led_classdev_register(dev, &led->cdev); >>>> + if (error < 0) >>>> + return -EINVAL; >>>> + INIT_WORK(&led->work, cap11xx_led_work); >>>> + schedule_work(&led->work); >>> >>> >>> Work queue should be initialized before registration of the LED class >>> device. >> What is the reason for this? Just curious > > It's a race condition. The LED device is accessible once > devm_led_classdev_register() returns. So a user could be calling into > cap11xx_led_set() before the work queue is initialized, which would > hence access a NULL pointer. Ah thanks for explaining. Will fix in v4. > > > Daniel > -- To unsubscribe from this list: send the line "unsubscribe linux-leds" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
