[PATCH 1/3] dma: mv_xor: use devm_clk_get_optional_enabled

[Rosen Penev <rosenp@gmail.com>]

Replace clk_get + clk_prepare_enable + clk_put with
devm_clk_get_optional_enabled. This eliminates the need for
manual clock cleanup in the probe error path.

It also fixes missing cleanup in a remove function.

Assisted-by: opencode:big-pickle
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/dma/mv_xor.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 25ed61f1b089..a97fa0038652 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1359,12 +1359,9 @@ static int mv_xor_probe(struct platform_device *pdev)
 			mv_xor_conf_mbus_windows(xordev, dram);
 	}
 
-	/* 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
@@ -1452,11 +1449,6 @@ 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;
 }
 
-- 
2.54.0