[PATCH 5.13 070/351] ALSA: ac97: fix PM reference leak in ac97_bus_remove()

Greg Kroah-Hartman
2021-07-19T17:27:33Z

From: Yufen Yu <yuyufen@huawei.com>

[ Upstream commit a38e93302ee25b2ca6f4ee76c6c974cf3637985e ]

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Link: https://lore.kernel.org/r/20210524093811.612302-1-yuyufen@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
sound/ac97/bus.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/ac97/bus.c b/sound/ac97/bus.c
index d9077e91382b..6ddf646cda65 100644
--- a/sound/ac97/bus.c
+++ b/sound/ac97/bus.c
@@ -520,7 +520,7 @@ static int ac97_bus_remove(struct device *dev)
struct ac97_codec_driver *adrv = to_ac97_driver(dev->driver);
int ret;

- ret = pm_runtime_get_sync(dev);
+ ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
return ret;

--
2.30.2