tree 362bbc0495f56ba9604dd93dc0d016eeb7515119
parent ccf6fd6dcc86143002dec6c392d8aa41a6a46353
author Andy Shevchenko <andriy.shevchenko@linux.intel.com> 1468231586 +0300
committer Linus Walleij <linus.walleij@linaro.org> 1469194242 +0200

gpio: merrifield: Protect irq_ack() and gpio_set() by lock

There is a potential race when two threads do the writes to the same register
in parallel.

Prevent out of order in such case by protecting I/O access by spin lock.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>