PM / runtime: Use pm_runtime_put_sync() in __device_release_driver()
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 7 Nov 2013 00:51:15 +0000 (01:51 +0100)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 7 Nov 2013 18:13:49 +0000 (19:13 +0100)
commitbaab52ded242c35a2290e1fa82e0cc147d0d8c1a
tree45264cbeae6fb364ff54d1fd7903040aef2e294e
parentd66e6db28df330c0e5b61f9863754fc2fd37f8ca
PM / runtime: Use pm_runtime_put_sync() in __device_release_driver()

Commit fa180eb448fa (PM / Runtime: Idle devices asynchronously after
probe|release) modified __device_release_driver() to call
pm_runtime_put(dev) instead of pm_runtime_put_sync(dev) before
detaching the driver from the device.  However, that was a mistake,
because pm_runtime_put(dev) causes rpm_idle() to be queued up and
the driver may be gone already when that function is executed.
That breaks the assumptions the drivers have the right to make
about the core's behavior on the basis of the existing documentation
and actually causes problems to happen, so revert that part of
commit fa180eb448fa and restore the previous behavior of
__device_release_driver().

Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Fixes: fa180eb448fa (PM / Runtime: Idle devices asynchronously after probe|release)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: 3.10+ <stable@vger.kernel.org> # 3.10+
drivers/base/dd.c