From f7b2bb8549e352353427d0f8913c96914dd0baab Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 28 Oct 2011 09:46:01 +0300
Subject: ALSA: hwdep: silence integer overflow warning
Smatch complains that if device is INT_MAX then device + 1 can
overflow. It just means we would have an annoying loop while we
check all the devices from -2147483648 to SNDRV_MINOR_HWDEPS.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/core/hwdep.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
(limited to 'sound/core')
diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c
index a70ee7f1ed98..031e215b6dde 100644
--- a/sound/core/hwdep.c
+++ b/sound/core/hwdep.c
@@ -272,7 +272,14 @@ static int snd_hwdep_control_ioctl(struct snd_card *card,
if (get_user(device, (int __user *)arg))
return -EFAULT;
mutex_lock(®ister_mutex);
- device = device < 0 ? 0 : device + 1;
+
+ if (device < 0)
+ device = 0;
+ else if (device < SNDRV_MINOR_HWDEPS)
+ device++;
+ else
+ device = SNDRV_MINOR_HWDEPS;
+
while (device < SNDRV_MINOR_HWDEPS) {
if (snd_hwdep_search(card, device))
break;
--
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