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-rw-r--r--sound/usb/usbaudio.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index de680d095e9..56e42b88add 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2463,6 +2463,7 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
* build the rate table and bitmap flags
*/
int r, idx, c;
+ unsigned int nonzero_rates = 0;
/* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
static unsigned int conv_rates[] = {
5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
@@ -2485,6 +2486,7 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
fp->altsetting == 5 && fp->maxpacksize == 392)
rate = 96000;
fp->rate_table[r] = rate;
+ nonzero_rates |= rate;
if (rate < fp->rate_min)
fp->rate_min = rate;
else if (rate > fp->rate_max)
@@ -2500,6 +2502,10 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
if (!found)
fp->needs_knot = 1;
}
+ if (!nonzero_rates) {
+ hwc_debug("All rates were zero. Skipping format!\n");
+ return -1;
+ }
if (fp->needs_knot)
fp->rates |= SNDRV_PCM_RATE_KNOT;
} else {