UPSTREAM: gpiolib: protect gpio_chip with SRCU in array_info paths in multi get/set

commit 81570d6a upstream.

During the locking rework in GPIOLIB, we omitted one important use-case,
namely: setting and getting values for GPIO descriptor arrays with
array_info present.

This patch does two things: first it makes struct gpio_array store the
address of the underlying GPIO device and not chip. Next: it protects
the chip with SRCU from removal in gpiod_get_array_value_complex() and
gpiod_set_array_value_complex().

Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250215095655.23152-1-brgl@bgdev.pl


Change-Id: Ie8edbcb161f8db0cbac92616d385826d408b5793
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 6f3edf2d)
Bug: 437846539
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>