[PATCHv4 dmaengine 2/2] dmaengine: mv_xor: use devm_clk_get_optional_enabled

[Rosen Penev <rosenp@gmail.com>]

Driver was written before this was available. Simplifies code slightly.

Actually also a bugfix. clk_disable_unprepare is missing in _remove,
which is also missing.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/dma/mv_xor.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 3597ad8d1220..d15a1990534b 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1351,9 +1351,9 @@ static int mv_xor_probe(struct platform_device *pdev)
 	/* Not all platforms can gate the clock, so it is not
 	 * an error if the clock does not exists.
 	 */
-	xordev->clk = clk_get(&pdev->dev, NULL);
-	if (!IS_ERR(xordev->clk))
-		clk_prepare_enable(xordev->clk);
+	xordev->clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
+	if (IS_ERR(xordev->clk))
+		return PTR_ERR(xordev->clk);
 
 	/*
 	 * We don't want to have more than one channel per CPU in
@@ -1441,11 +1441,6 @@ static int mv_xor_probe(struct platform_device *pdev)
 				irq_dispose_mapping(xordev->channels[i]->irq);
 		}
 
-	if (!IS_ERR(xordev->clk)) {
-		clk_disable_unprepare(xordev->clk);
-		clk_put(xordev->clk);
-	}
-
 	return ret;
 }
 
-- 
2.51.2