dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()

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@huawei.com>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20210706124521.1371901-1-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sh/usb-dmac.c b/drivers/dma/sh/usb-dmac.c
index 8f7ceb698226ca7d29a91e39821e57c27c7863f0..1cc06900153e4c6f763b8b35e2458869d61e53b7 100644 (file)
--- a/drivers/dma/sh/usb-dmac.c
+++ b/drivers/dma/sh/usb-dmac.c
@@ -855,8 +855,8 @@ 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;
 }