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由 Dan Williams 提交于
The notification of scrub completion happens within the scrub workqueue. That can clearly race someone running scrub_show() and work_busy() before the workqueue has a chance to flush the recently completed work. Add a flag to reliably indicate the idle vs busy state. Without this change applications using poll(2) to wait for scrub-completion may falsely wakeup and read ARS as being busy even though the thread is going idle and then hang indefinitely. Fixes: bc6ba808 ("nfit, address-range-scrub: rework and simplify ARS...") Cc: <stable@vger.kernel.org> Reported-by: NVishal Verma <vishal.l.verma@intel.com> Tested-by: NVishal Verma <vishal.l.verma@intel.com> Reported-by: NLukasz Dorau <lukasz.dorau@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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