diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2011-10-28 09:46:01 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-10-31 09:52:43 +0100 |
| commit | f7b2bb8549e352353427d0f8913c96914dd0baab (patch) | |
| tree | 33f5ae7bb40d02c9a552115a0dd587029f2e32f6 | |
| parent | 8128c9f21509f9a8b6da94ac432d845dda458406 (diff) | |
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>
| -rw-r--r-- | sound/core/hwdep.c | 9 |
1 files changed, 8 insertions, 1 deletions
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; |