From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 28 Oct 2011 06:46:01 +0000 (+0300)
Subject: ALSA: hwdep: silence integer overflow warning
X-Git-Tag: MMI-PSA29.97-13-9~18103^2~19
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f7b2bb8549e352353427d0f8913c96914dd0baab;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git

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>
---

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(&register_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;