From: wu000273@umn.edu
To: kjlu@umn.edu
Cc: wu000273@umn.edu,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] media: vsp1: Fix a reference count leak.
Date: Sat, 13 Jun 2020 18:23:57 -0500 [thread overview]
Message-ID: <20200613232357.18155-1-wu000273@umn.edu> (raw)
From: Qiushi Wu <wu000273@umn.edu>
pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code, causing incorrect ref count if
pm_runtime_put_noidle() is not called in error handling paths.
Thus call pm_runtime_put_noidle() if pm_runtime_get_sync() fails.
Fixes: 1e6af546ee66 ("[media] v4l: vsp1: Implement runtime PM support")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
drivers/media/platform/vsp1/vsp1_drv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/vsp1/vsp1_drv.c b/drivers/media/platform/vsp1/vsp1_drv.c
index c650e45bb0ad..222c9e1261a0 100644
--- a/drivers/media/platform/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/vsp1/vsp1_drv.c
@@ -846,8 +846,10 @@ static int vsp1_probe(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_noidle(&pdev->dev);
goto done;
+ }
vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
pm_runtime_put_sync(&pdev->dev);
--
2.17.1
next reply other threads:[~2020-06-13 23:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-13 23:23 wu000273 [this message]
2020-06-16 2:07 ` [PATCH] media: vsp1: Fix a reference count leak Laurent Pinchart
2020-06-16 2:09 ` Laurent Pinchart
2020-06-22 10:21 ` Hans Verkuil
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