dmaengine: rcar-dmac: Fix PM reference leak in rcar_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 replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/1622442963-54095-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index d530c1b..6885b3d 100644 (file)
--- 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;