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* [PATCH -next] spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware()
@ 2021-04-09  9:54 Wang Li
  2021-04-09 16:22 ` Mark Brown
  0 siblings, 1 reply; 2+ messages in thread
From: Wang Li @ 2021-04-09  9:54 UTC (permalink / raw)
  To: broonie, han.xu, xiaoning.wang, frank.li; +Cc: linux-spi, linux-kernel, 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.

Fixes: 944c01a889d9 ("spi: lpspi: enable runtime pm for lpspi")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Li <wangli74@huawei.com>
---
 drivers/spi/spi-fsl-lpspi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index a2886ee44e4c..5d98611dd999 100644
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -200,7 +200,7 @@ static int lpspi_prepare_xfer_hardware(struct spi_controller *controller)
 				spi_controller_get_devdata(controller);
 	int ret;
 
-	ret = pm_runtime_get_sync(fsl_lpspi->dev);
+	ret = pm_runtime_resume_and_get(fsl_lpspi->dev);
 	if (ret < 0) {
 		dev_err(fsl_lpspi->dev, "failed to enable clock\n");
 		return ret;
-- 
2.17.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH -next] spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware()
  2021-04-09  9:54 [PATCH -next] spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware() Wang Li
@ 2021-04-09 16:22 ` Mark Brown
  0 siblings, 0 replies; 2+ messages in thread
From: Mark Brown @ 2021-04-09 16:22 UTC (permalink / raw)
  To: xiaoning.wang, Wang Li, frank.li, han.xu
  Cc: Mark Brown, linux-kernel, linux-spi

On Fri, 9 Apr 2021 09:54:30 +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: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware()
      commit: a03675497970a93fcf25d81d9d92a59c2d7377a7

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

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2021-04-09  9:54 [PATCH -next] spi: fsl-lpspi: Fix PM reference leak in lpspi_prepare_xfer_hardware() Wang Li
2021-04-09 16:22 ` Mark Brown

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