linux-kernel - [PATCH 1/2] misc: arm-charlcd: remove unnecessary platform_set

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Date:	Tue, 07 May 2013 14:32:11 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Arnd Bergmann' <arnd@...db.de>,
	'Greg Kroah-Hartman' <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org,
	'Linus Walleij' <linus.walleij@...aro.org>,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: [PATCH 1/2] misc: arm-charlcd: remove unnecessary
 platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@...sung.com>
---
 drivers/misc/arm-charlcd.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/arm-charlcd.c b/drivers/misc/arm-charlcd.c
index 48651ef..1256a4b 100644
--- a/drivers/misc/arm-charlcd.c
+++ b/drivers/misc/arm-charlcd.c
@@ -291,7 +291,7 @@ static int __init charlcd_probe(struct platform_device *pdev)
 	lcd->virtbase = ioremap(lcd->phybase, lcd->physize);
 	if (!lcd->virtbase) {
 		ret = -ENOMEM;
-		goto out_no_remap;
+		goto out_no_memregion;
 	}
 
 	lcd->irq = platform_get_irq(pdev, 0);
@@ -320,8 +320,6 @@ static int __init charlcd_probe(struct platform_device *pdev)
 
 out_no_irq:
 	iounmap(lcd->virtbase);
-out_no_remap:
-	platform_set_drvdata(pdev, NULL);
 out_no_memregion:
 	release_mem_region(lcd->phybase, SZ_4K);
 out_no_resource:
@@ -337,7 +335,6 @@ static int __exit charlcd_remove(struct platform_device *pdev)
 		free_irq(lcd->irq, lcd);
 		iounmap(lcd->virtbase);
 		release_mem_region(lcd->phybase, lcd->physize);
-		platform_set_drvdata(pdev, NULL);
 		kfree(lcd);
 	}
 
-- 
1.7.2.5


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