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Andy Shevchenko authored
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>
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