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    SubjectRe: [PATCH] pwm-backlight: add regulator and GPIO support
    On Wed 04 Jul 2012 10:00:56 PM JST, Sascha Hauer wrote:
    >> That's very bad indeed. I assumed that the kernel would free
    >> devm-allocated resources after probe returned -EPROBE_DEFER,
    > It indeed does free devm allocated resources, but neither the gpio nor
    > the pwm are devm allocated.

    As far as I can tell the gpio is allocated through devm as well:

    > + ret = devm_gpio_request_one(&pdev->dev, data->enable_gpio,
    > + GPIOF_OUT_INIT_HIGH, "backlight_enable");

    Thus if it is not reclaimed with probe returns with -EPROBE_DEFER, then
    I guess something is going wrong elsewhere. You are right that the PWM
    should be freed by the driver thought.

    > Also please be aware that using a regulator in the pwm backlight will
    > instantly break all existing users. That's hardly your fault though.

    Sorry, I don't see why. Could you elaborate on this?


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