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

[Linus Walleij]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/