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9442982a9b
old_val may change value after cmpxchg, need to reset to 0 for next loop comparison. BUG=None BRANCH=master TEST=On Soraka modified for ISH board, running more than 4 hours sensor data fetching by host command, and no problem. Change-Id: I720230e196771071c8ba204458da6c4788d374ea Signed-off-by: li feng <li1.feng@intel.com> Reviewed-on: https://chromium-review.googlesource.com/738914 Commit-Ready: Li1 Feng <li1.feng@intel.com> Tested-by: Li1 Feng <li1.feng@intel.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org>