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From: wu000273@umn.edu
To: kjlu@umn.edu
Cc: wu000273@umn.edu, Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>, Heiko Stuebner <heiko@sntech.de>,
	Sugar Zhang <sugar.zhang@rock-chips.com>,
	alsa-devel@alsa-project.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: rockchip: Fix a reference count leak.
Date: Sat, 13 Jun 2020 15:51:58 -0500
Message-ID: <20200613205158.27296-1-wu000273@umn.edu> (raw)

From: Qiushi Wu <wu000273@umn.edu>

Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count if pm_runtime_put is not called in
error handling paths. Call pm_runtime_put if pm_runtime_get_sync fails.

Fixes: fc05a5b22253 ("ASoC: rockchip: add support for pdm controller")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
 sound/soc/rockchip/rockchip_pdm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index 7cd42fcfcf38..1707414cfa92 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -590,8 +590,10 @@ static int rockchip_pdm_resume(struct device *dev)
 	int ret;
 
 	ret = pm_runtime_get_sync(dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put(dev);
 		return ret;
+	}
 
 	ret = regcache_sync(pdm->regmap);
 
-- 
2.17.1


             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-13 20:51 wu000273 [this message]
2020-06-18 12:32 ` Heiko Stübner
2020-06-18 16:48 ` Mark Brown

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