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ALSA: usb-audio: add check for faulty clock in parse_audio_format_rat…
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…es_v2()

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Daniel Mack authored and Takashi Iwai committed Jun 11, 2010
1 parent ff8bd64 commit d07140b
Showing 1 changed file with 6 additions and 0 deletions.
6 changes: 6 additions & 0 deletions sound/usb/format.c
Original file line number Diff line number Diff line change
Expand Up @@ -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,
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