[PATCH 4.6 060/121] PM / Runtime: Fix error path in pm_runtime_force_resume()

[Greg Kroah-Hartman]

4.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ulf Hansson <ulf.hans...@linaro.org>

commit 0ae3aeefabbeef26294e7a349b51f1c761d46c9f upstream.

As pm_runtime_set_active() may fail because the device's parent isn't
active, we can end up executing the ->runtime_resume() callback for the
device when it isn't allowed.

Fix this by invoking pm_runtime_set_active() before running the callback
and let's also deal with the error code.

Fixes: 37f204164dfb (PM: Add pm_runtime_suspend|resume_force functions)
Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Reviewed-by: Linus Walleij <linus.wall...@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/base/power/runtime.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1506,11 +1506,16 @@ int pm_runtime_force_resume(struct devic
                goto out;
        }
 
-       ret = callback(dev);
+       ret = pm_runtime_set_active(dev);
        if (ret)
                goto out;
 
-       pm_runtime_set_active(dev);
+       ret = callback(dev);
+       if (ret) {
+               pm_runtime_set_suspended(dev);
+               goto out;
+       }
+
        pm_runtime_mark_last_busy(dev);
 out:
        pm_runtime_enable(dev);