4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
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.hansson@xxxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -1468,11 +1468,16 @@ 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);
--
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