[PATCH 1/3] dmaengine: rcar-dmac: Fix PM usage counter imbalance

[Wolfram Sang <wsa+renesas@sang-engineering.com>]

From: Zhang Shurong <zhang_shurong@foxmail.com>

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here. We
fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Fixes: 87244fe5abdf ("dmaengine: rcar-dmac: Add Renesas R-Car Gen2 DMA Controller (DMAC) driver")
Signed-off-by: Zhang Shurong <zhang_shurong@foxmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/dma/sh/rcar-dmac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 3ad8aba5dcd4..5b54f1c4ce15 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1070,7 +1070,7 @@ static int rcar_dmac_alloc_chan_resources(struct dma_chan *chan)
 	if (ret < 0)
 		return -ENOMEM;
 
-	return pm_runtime_get_sync(chan->device->dev);
+	return pm_runtime_resume_and_get(chan->device->dev);
 }
 
 static void rcar_dmac_free_chan_resources(struct dma_chan *chan)
-- 
2.53.0