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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-02-25 21:23:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-09 13:09:37 +0300 |
| commit | 52a6436801652d1ec4e77b47d78be92256a7692f (patch) | |
| tree | 6244aca171e77856b175e0462386d3ae5cc4cb42 /drivers/md/dm-bufio.c | |
| parent | e49baccfe29907cb26a82e29ded6797c638fed92 (diff) | |
| download | linux-52a6436801652d1ec4e77b47d78be92256a7692f.tar.xz | |
PM: runtime: Update device status before letting suppliers suspend
commit 44cc89f764646b2f1f2ea5d1a08b230131707851 upstream.
Because the PM-runtime status of the device is not updated in
__rpm_callback(), attempts to suspend the suppliers of the given
device triggered by rpm_put_suppliers() called by it may fail.
Fix this by making __rpm_callback() update the device's status to
RPM_SUSPENDED before calling rpm_put_suppliers() if the current
status of the device is RPM_SUSPENDING and the callback just invoked
by it has returned 0 (success).
While at it, modify the code in __rpm_callback() to always check
the device's PM-runtime status under its PM lock.
Link: https://lore.kernel.org/linux-pm/CAPDyKFqm06KDw_p8WXsM4dijDbho4bb6T4k50UqqvR1_COsp8g@mail.gmail.com/
Fixes: 21d5c57b3726 ("PM / runtime: Use device links")
Reported-by: Elaine Zhang <zhangqing@rock-chips.com>
Diagnosed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Elaine Zhang <zhangiqng@rock-chips.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: 4.10+ <stable@vger.kernel.org> # 4.10+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-bufio.c')
0 files changed, 0 insertions, 0 deletions