Commit 55a6bbba authored by yixuanjiang's avatar yixuanjiang
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aoc: add mutex protect on aoc suspend resume 



AOC may crash during kernel suspend or resume.
add mutex lock and NULL check if using aoc service.

Bug: 201202943
Signed-off-by: default avataryixuanjiang <yixuanjiang@google.com>
Change-Id: Ia4e1583e376ef3803bcd9d830b9f907a87a78fef
parent 87512c1d
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