This is a note to let you know that I've just added the patch titled
i2c: img-scb: fix reference leak when pm_runtime_get_sync fails
to the 5.10-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:
i2c-img-scb-fix-reference-leak-when-pm_runtime_get_s.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4faa6a48476df07b37b8b62e15458fecf56d4f2c
Author: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
Date: Tue Dec 1 17:31:39 2020 +0800
i2c: img-scb: fix reference leak when pm_runtime_get_sync fails
[ Upstream commit 223125e37af8a641ea4a09747a6a52172fc4b903 ]
The PM reference count is not expected to be incremented on
return in functions img_i2c_xfer and img_i2c_init.
However, pm_runtime_get_sync will increment the PM reference
count even failed. Forgetting to putting operation will result
in a reference leak here.
Replace it with pm_runtime_resume_and_get to keep usage
counter balanced.
Fixes: 93222bd9b966 ("i2c: img-scb: Add runtime PM")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/i2c/busses/i2c-img-scb.c b/drivers/i2c/busses/i2c-img-scb.c
index 98a89301ed2a..8e987945ed45 100644
--- a/drivers/i2c/busses/i2c-img-scb.c
+++ b/drivers/i2c/busses/i2c-img-scb.c
@@ -1057,7 +1057,7 @@ static int img_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
atomic = true;
}
- ret = pm_runtime_get_sync(adap->dev.parent);
+ ret = pm_runtime_resume_and_get(adap->dev.parent);
if (ret < 0)
return ret;
@@ -1158,7 +1158,7 @@ static int img_i2c_init(struct img_i2c *i2c)
u32 rev;
int ret;
- ret = pm_runtime_get_sync(i2c->adap.dev.parent);
+ ret = pm_runtime_resume_and_get(i2c->adap.dev.parent);
if (ret < 0)
return ret;
