This is a note to let you know that I've just added the patch titled i2c: imx: 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-imx-fix-reference-leak-when-pm_runtime_get_sync-.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 c31186395dd5329287f9a7e89e5fa068a85da0ce Author: Qinglang Miao <miaoqinglang@xxxxxxxxxx> Date: Tue Dec 1 17:31:41 2020 +0800 i2c: imx: fix reference leak when pm_runtime_get_sync fails [ Upstream commit 47ff617217ca6a13194fcb35c6c3a0c57c080693 ] In i2c_imx_xfer() and i2c_imx_remove(), the pm reference count is not expected to be incremented on return. However, pm_runtime_get_sync will increment 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: 3a5ee18d2a32 ("i2c: imx: implement master_xfer_atomic callback") Reported-by: Hulk Robot <hulkci@xxxxxxxxxx> Signed-off-by: Qinglang Miao <miaoqinglang@xxxxxxxxxx> Reviewed-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index e6f8d6e45a15..72af4b4d1318 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -1036,7 +1036,7 @@ static int i2c_imx_xfer(struct i2c_adapter *adapter, struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(adapter); int result; - result = pm_runtime_get_sync(i2c_imx->adapter.dev.parent); + result = pm_runtime_resume_and_get(i2c_imx->adapter.dev.parent); if (result < 0) return result; @@ -1280,7 +1280,7 @@ static int i2c_imx_remove(struct platform_device *pdev) struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev); int irq, ret; - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); if (ret < 0) return ret;