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authorDan Carpenter <dan.carpenter@oracle.com>2015-09-23 12:42:28 +0300
committerTakashi Iwai <tiwai@suse.de>2015-09-24 11:46:25 +0200
commit145d92e77e6f34f53773fdb06789816ec2b6c7b3 (patch)
tree4c0ac01ee00cc28a07d8e67c7de643b90623b435
parent13f3a46d2a6cbdff1bbb06fac6de7dce753db8e1 (diff)
ALSA: core: check for underflow in snd_pcm_sw_params()
As far as I can see, having an invalid ->tstamp_mode is harmless, but adding a check silences a static checker warning. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/core/pcm_native.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 75888dd38a7f..4863af5e7b26 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -650,7 +650,8 @@ static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
}
snd_pcm_stream_unlock_irq(substream);
- if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
+ if (params->tstamp_mode < 0 ||
+ params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
return -EINVAL;
if (params->proto >= SNDRV_PROTOCOL_VERSION(2, 0, 12) &&
params->tstamp_type > SNDRV_PCM_TSTAMP_TYPE_LAST)