nfit, address-range-scrub: fix scrub in-progress reporting

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commit 78727137fd upstream.

There is a small window whereby ARS scan requests can schedule work that
userspace will miss when polling scrub_show. Hold the init_mutex lock
over calls to report the status to close this potential escape. Also,
make sure that requests to cancel the ARS workqueue are treated as an
idle event.

Cc: <stable@vger.kernel.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Fixes: 37b137ff8c ("nfit, libnvdimm: allow an ARS scrub...")
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Dan Williams 2018-04-02 16:40:04 -07:00 • committed by Greg Kroah-Hartman

parent b68b77c935

commit 5520091356

1 changed files with 4 additions and 1 deletions

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drivers/acpi/nfit/core.c

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