Re: [PATCH v2 20/23] gpio: sysfs: fix race between gpiod export and unexport

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Mon, May 4, 2015 at 5:10 PM, Johan Hovold <johan@xxxxxxxxxx> wrote:

> Make sure to deregister the class device (and release the irq) while
> holding the sysfs lock in gpio_unexport to prevent racing with
> gpio_export.
>
> Note that this requires the recently introduced per-gpio locking to
> avoid a deadlock with the kernfs active protection when waiting for the
> attribute operations to drain during deregistration.
>
> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>

Patch applied.

Yours,
Linus Walleij
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