linux-kernel - [PATCH 8/14] drivers/video/sunxvr2500.c: fix error return code

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Message-Id: <1345365870-29831-9-git-send-email-Julia.Lawall@lip6.fr>
Date:	Sun, 19 Aug 2012 10:44:24 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Florian Tobias Schandinat <FlorianSchandinat@....de>
Cc:	kernel-janitors@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 8/14] drivers/video/sunxvr2500.c: fix error return code

From: Julia Lawall <Julia.Lawall@...6.fr>

Initialize return variable before exiting on an error path.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}

// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/video/sunxvr2500.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/video/sunxvr2500.c b/drivers/video/sunxvr2500.c
index 5848436..7fbcba8 100644
--- a/drivers/video/sunxvr2500.c
+++ b/drivers/video/sunxvr2500.c
@@ -181,8 +181,10 @@ static int __devinit s3d_pci_register(struct pci_dev *pdev,
 	sp->fb_size = info->fix.line_length * sp->height;
 
 	sp->fb_base = ioremap(sp->fb_base_phys, sp->fb_size);
-	if (!sp->fb_base)
+	if (!sp->fb_base) {
+		err = -ENOMEM;
 		goto err_release_pci;
+	}
 
 	err = s3d_set_fbinfo(sp);
 	if (err)

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