[PATCH 4.19 51/84] dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()

[Sasha Levin]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

[ Upstream commit 1da569fa7ec8cb0591c74aa3050d4ea1397778b4 ]

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 moving the error_pm label above the pm_runtime_put() in
the error path.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210706124521.1371901-1-yukuai3@xxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/dma/sh/usb-dmac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/sh/usb-dmac.c b/drivers/dma/sh/usb-dmac.c
index 6c94ed750049..d77bf325f038 100644
--- a/drivers/dma/sh/usb-dmac.c
+++ b/drivers/dma/sh/usb-dmac.c
@@ -860,8 +860,8 @@ static int usb_dmac_probe(struct platform_device *pdev)
 
 error:
 	of_dma_controller_free(pdev->dev.of_node);
-	pm_runtime_put(&pdev->dev);
 error_pm:
+	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	return ret;
 }
-- 
2.30.2