On Mon, Mar 1, 2021 at 10:05 AM Johan Hovold [off-list ref] wrote:

Make sure to hold the gpio_lock when removing the gpio device from the
gpio_devices list (when dropping the last reference) to avoid corrupting
the list when there are concurrent accesses.

Fixes: ff2b13592299 ("gpio: make the gpiochip a real device")
Cc: stable@vger.kernel.org      # 4.6
Reviewed-by: Saravana Kannan <redacted>
Signed-off-by: Johan Hovold <johan@kernel.org>

Excellent fix as well,
Reviewed-by: Linus Walleij <redacted>

Yours,
Linus Walleij