linux-kernel - [Patch] Fix signedness error in drivers/media/video/vivi.c

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Date:	Sat, 19 Aug 2006 18:19:27 +0200
From:	Eric Sesterhenn <snakebyte@....de>
To:	linux-kernel@...r.kernel.org
Cc:	mchehab@...radead.org
Subject: [Patch] Fix signedness error in drivers/media/video/vivi.c

hi,

when checking the -Wextra signedness warnings issued by gcc 4.1
I came across this one:

drivers/media/video/vivi.c:1001: warning: comparison of unsigned expression < 0 is always false

Since videobuf_reqbufs() returns negative values on errors the current
code does no real error checking since gcc removes the comparison.
This patch fixes this issue by making ret a normal, signed integer.

Signed-off-by: Eric Sesterhenn <snakebyte@....de>

--- linux-2.6.18-rc4/drivers/media/video/vivi.c.orig	2006-08-19 18:13:45.000000000 +0200
+++ linux-2.6.18-rc4/drivers/media/video/vivi.c	2006-08-19 18:14:16.000000000 +0200
@@ -992,7 +992,8 @@ static int vidiocgmbuf (struct file *fil
 	struct vivi_fh  *fh=priv;
 	struct videobuf_queue *q=&fh->vb_vidq;
 	struct v4l2_requestbuffers req;
-	unsigned int i, ret;
+	unsigned int i;
+	int ret;
 
 	req.type   = q->type;
 	req.count  = 8;


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