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| author | Dan Williams <dan.j.williams@intel.com> | 2018-07-06 00:58:49 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2018-07-06 05:33:53 +0300 |
| commit | 33cc2c9667561b224215e6dfb5bf98e8fa17914e (patch) | |
| tree | 64f01a6dcb817b41fc694dc2a31999650c91a3c1 /drivers/dax | |
| parent | 1273c253c32b9a073a4d8921ed079177ccc7c8af (diff) | |
| download | linux-33cc2c9667561b224215e6dfb5bf98e8fa17914e.tar.xz | |
acpi, nfit: Fix scrub idle detection
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: bc6ba8085842 ("nfit, address-range-scrub: rework and simplify ARS...")
Cc: <stable@vger.kernel.org>
Reported-by: Vishal Verma <vishal.l.verma@intel.com>
Tested-by: Vishal Verma <vishal.l.verma@intel.com>
Reported-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dax')
0 files changed, 0 insertions, 0 deletions