[PATCH -next] spi: qup: fix PM reference leak in spi_qup_remove()

[PATCH -next] spi: qup: fix PM reference leak in spi_qup_remove()

[Wang Li]

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Li <wangli74@huawei.com>
---
 drivers/spi/spi-qup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 8dcb2e70735c..d39dec6d1c91 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -1263,7 +1263,7 @@ static int spi_qup_remove(struct platform_device *pdev)
 	struct spi_qup *controller = spi_master_get_devdata(master);
 	int ret;
 
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0)
 		return ret;
 
-- 
2.17.1

Re: [PATCH -next] spi: qup: fix PM reference leak in spi_qup_remove()

[Manivannan Sadhasivam]

On Fri, Apr 09, 2021 at 09:54:58AM +0000, Wang Li wrote:
> pm_runtime_get_sync will increment pm usage counter even it failed.
> Forgetting to putting operation will result in reference leak here.
> Fix it by replacing it with pm_runtime_resume_and_get to keep usage
> counter balanced.
> 
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Wang Li <wangli74@huawei.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Thanks,
Mani

> ---
>  drivers/spi/spi-qup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
> index 8dcb2e70735c..d39dec6d1c91 100644
> --- a/drivers/spi/spi-qup.c
> +++ b/drivers/spi/spi-qup.c
> @@ -1263,7 +1263,7 @@ static int spi_qup_remove(struct platform_device *pdev)
>  	struct spi_qup *controller = spi_master_get_devdata(master);
>  	int ret;
>  
> -	ret = pm_runtime_get_sync(&pdev->dev);
> +	ret = pm_runtime_resume_and_get(&pdev->dev);
>  	if (ret < 0)
>  		return ret;
>  
> -- 
> 2.17.1
> 

Re: [PATCH -next] spi: qup: fix PM reference leak in spi_qup_remove()

[Mark Brown]

On Fri, 9 Apr 2021 09:54:58 +0000, Wang Li wrote:
> pm_runtime_get_sync will increment pm usage counter even it failed.
> Forgetting to putting operation will result in reference leak here.
> Fix it by replacing it with pm_runtime_resume_and_get to keep usage
> counter balanced.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/1] spi: qup: fix PM reference leak in spi_qup_remove()
      commit: cec77e0a249892ceb10061bf17b63f9fb111d870

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark