linux-kernel - [PATCH 1/2] arch/arm/mach-omap2/dma.c: Convert IS_ERR result to PTR

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Date:	Thu, 27 Jan 2011 16:49:06 +0100
From:	Julia Lawall <julia@...u.dk>
To:	Tony Lindgren <tony@...mide.com>
Cc:	kernel-janitors@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] arch/arm/mach-omap2/dma.c: Convert IS_ERR result to PTR_ERR

This code elsewhere returns a negative constant to an indicate an error,
while IS_ERR returns the result of a >= operation.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x;
@@

 if (...) { ...
- return IS_ERR(x);
+ return PTR_ERR(x);
}
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 arch/arm/mach-omap2/dma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -u -p a/arch/arm/mach-omap2/dma.c b/arch/arm/mach-omap2/dma.c
--- a/arch/arm/mach-omap2/dma.c
+++ b/arch/arm/mach-omap2/dma.c
@@ -264,7 +264,7 @@ static int __init omap2_system_dma_init_
 	if (IS_ERR(od)) {
 		pr_err("%s: Cant build omap_device for %s:%s.\n",
 			__func__, name, oh->name);
-		return IS_ERR(od);
+		return PTR_ERR(od);
 	}
 
 	mem = platform_get_resource(&od->pdev, IORESOURCE_MEM, 0);

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