This is a note to let you know that I've just added the patch titled
dmaengine: rcar-dmac: Fix PM reference leak in rcar_dmac_probe()
to the 5.12-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:
dmaengine-rcar-dmac-fix-pm-reference-leak-in-rcar_dm.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 12cb300119b988398bf75812e3cc39ca14a0bff2
Author: Zou Wei <zou_wei@xxxxxxxxxx>
Date: Mon May 31 14:36:03 2021 +0800
dmaengine: rcar-dmac: Fix PM reference leak in rcar_dmac_probe()
[ Upstream commit dea8464ddf553803382efb753b6727dbf3931d06 ]
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@xxxxxxxxxx>
Signed-off-by: Zou Wei <zou_wei@xxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Link: https://lore.kernel.org/r/1622442963-54095-1-git-send-email-zou_wei@xxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index d530c1bf11d9..6885b3dcd7a9 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1913,7 +1913,7 @@ static int rcar_dmac_probe(struct platform_device *pdev)
/* Enable runtime PM and initialize the device. */
pm_runtime_enable(&pdev->dev);
- ret = pm_runtime_get_sync(&pdev->dev);
+ ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0) {
dev_err(&pdev->dev, "runtime PM get sync failed (%d)\n", ret);
return ret;
