linux-kernel - [51/55] ALSA: sound/core/pcm_compat.c: adjust array index

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Date:	Fri, 05 Aug 2011 17:02:21 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Julia Lawall <julia@...u.dk>, Takashi Iwai <tiwai@...e.de>
Subject: [51/55] ALSA: sound/core/pcm_compat.c: adjust array index

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Julia Lawall <julia@...u.dk>

commit ca9380fd68514c7bc952282c1b4fc70607e9fe43 upstream.

Convert array index from the loop bound to the loop index.

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

// <smpl>
@@
expression e1,e2,ar;
@@

for(e1 = 0; e1 < e2; e1++) { <...
  ar[
- e2
+ e1
  ]
  ...> }
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 sound/core/pcm_compat.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/core/pcm_compat.c
+++ b/sound/core/pcm_compat.c
@@ -341,7 +341,7 @@ static int snd_pcm_ioctl_xfern_compat(st
 			kfree(bufs);
 			return -EFAULT;
 		}
-		bufs[ch] = compat_ptr(ptr);
+		bufs[i] = compat_ptr(ptr);
 		bufptr++;
 	}
 	if (dir == SNDRV_PCM_STREAM_PLAYBACK)


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