linux-kernel - [PATCH] dma: sh: remove unnecessary platform_set

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Date:	Wed, 21 Aug 2013 18:45:35 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Vinod Koul' <vinod.koul@...el.com>
Cc:	'Dan Williams' <djbw@...com>, linux-kernel@...r.kernel.org,
	'Simon Horman' <horms+renesas@...ge.net.au>,
	'Guennadi Liakhovetski' <g.liakhovetski@....de>,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH] dma: sh: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/dma/sh/shdma.c  |    3 ---
 drivers/dma/sh/sudmac.c |    2 --
 2 files changed, 5 deletions(-)

diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c
index 211e2f1..208de0f 100644
--- a/drivers/dma/sh/shdma.c
+++ b/drivers/dma/sh/shdma.c
@@ -873,7 +873,6 @@ rst_err:
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
-	platform_set_drvdata(pdev, NULL);
 	shdma_cleanup(&shdev->shdma_dev);
 eshdma:
 	if (dmars)
@@ -917,8 +916,6 @@ static int sh_dmae_remove(struct platform_device *pdev)
 		iounmap(shdev->dmars);
 	iounmap(shdev->chan_reg);
 
-	platform_set_drvdata(pdev, NULL);
-
 	synchronize_rcu();
 	kfree(shdev);
 
diff --git a/drivers/dma/sh/sudmac.c b/drivers/dma/sh/sudmac.c
index c494417..23fffc8 100644
--- a/drivers/dma/sh/sudmac.c
+++ b/drivers/dma/sh/sudmac.c
@@ -393,7 +393,6 @@ static int sudmac_probe(struct platform_device *pdev)
 chan_probe_err:
 	sudmac_chan_remove(su_dev);
 
-	platform_set_drvdata(pdev, NULL);
 	shdma_cleanup(&su_dev->shdma_dev);
 
 	return err;
@@ -407,7 +406,6 @@ static int sudmac_remove(struct platform_device *pdev)
 	dma_async_device_unregister(dma_dev);
 	sudmac_chan_remove(su_dev);
 	shdma_cleanup(&su_dev->shdma_dev);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }
-- 
1.7.10.4


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