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Commit 369b240d authored by Roel Kluin's avatar Roel Kluin Committed by Takashi Iwai
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[ALSA] sound/drivers/dummy.c: fix negative snd_pcm_format_width() check 



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

Signed-off-by: default avatarRoel Kluin <12o3l@tiscali.nl>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 7943a8ab

sound/drivers/dummy.c

+5 −4
Original line number Diff line number Diff line
@@ -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);