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[ALSA] sound/drivers/dummy.c: fix negative snd_pcm_format_width() check

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bps is unsigned, a negative snd_pcm_format_width() return value is not noticed

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Roel Kluin 2008-04-16 19:30:30 +02:00 committed by Takashi Iwai
parent 7943a8aba9
commit 369b240d63
1 changed files with 5 additions and 4 deletions
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9
sound/drivers/dummy.c
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@ -230,13 +230,14 @@ static int snd_card_dummy_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dummy_pcm *dpcm = runtime->private_data;
unsigned int bps;
int bps;
bps = snd_pcm_format_width(runtime->format) * runtime->rate *
runtime->channels / 8;
bps = runtime->rate * runtime->channels;
bps *= snd_pcm_format_width(runtime->format);
bps /= 8;
if (bps <= 0)
return -EINVAL;
dpcm->pcm_bps = bps;
dpcm->pcm_hz = HZ;
dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);