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ALSA: usb-audio: add check for faulty clock in parse_audio_format_rates_v2()

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Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack 2010-06-11 17:34:19 +02:00 committed by Takashi Iwai
parent ff8bd64eaf
commit d07140ba7f
1 changed files with 6 additions and 0 deletions
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6
sound/usb/format.c
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@ -218,6 +218,12 @@ static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
int i, nr_rates, data_size, ret = 0;
int clock = snd_usb_clock_find_source(chip, chip->ctrl_intf, fp->clock);
if (clock < 0) {
snd_printk(KERN_ERR "%s(): unable to find clock source (clock %d)\n",
__func__, clock);
goto err;
}
/* get the number of sample rates first by only fetching 2 bytes */
ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,