This is a note to let you know that I've just added the patch titled
PM / Runtime: Fix error path in pm_runtime_force_resume()
to the 4.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pm-runtime-fix-error-path-in-pm_runtime_force_resume.patch
and it can be found in the queue-4.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0ae3aeefabbeef26294e7a349b51f1c761d46c9f Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Date: Fri, 8 Apr 2016 13:10:23 +0200
Subject: PM / Runtime: Fix error path in pm_runtime_force_resume()
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
@@ -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);
Patches currently in stable-queue which might be from ulf.hansson@xxxxxxxxxx are
queue-4.6/pm-runtime-fix-error-path-in-pm_runtime_force_resume.patch
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