On Tue, Dec 01, 2020 at 05:31:41PM +0800, Qinglang Miao wrote:
> 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>
Thank you!
Reviewed-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> ---
> drivers/i2c/busses/i2c-imx.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
> index c98529c76..93d2069da 100644
> --- a/drivers/i2c/busses/i2c-imx.c
> +++ b/drivers/i2c/busses/i2c-imx.c
> @@ -1008,7 +1008,7 @@ 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;
>
> @@ -1252,7 +1252,7 @@ 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;
>
> --
> 2.23.0
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
