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[added,to,the,3.18,stable,tree] PM / Runtime: Fix error path in pm_runtime_force_resume()

Message ID 1464990398-17381-13-git-send-email-sasha.levin@oracle.com
State New
Headers show

Commit Message

Sasha Levin June 3, 2016, 9:45 p.m. UTC 
From: Ulf Hansson <ulf.hansson@linaro.org>


This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.

-- 
2.5.0

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Patch

===============

[ Upstream commit 0ae3aeefabbeef26294e7a349b51f1c761d46c9f ]

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@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
---
 drivers/base/power/runtime.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 67c7938..f6f1f90 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1474,11 +1474,16 @@  int pm_runtime_force_resume(struct device *dev)
 		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);