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ALSA: usb-audio: add check for faulty clock in parse_audio_format_rates_v2()
author
Daniel Mack
<daniel@caiaq.de>
Fri, 11 Jun 2010 15:34:19 +0000
(17:34 +0200)
committer
Takashi Iwai
<tiwai@suse.de>
Fri, 11 Jun 2010 16:05:05 +0000
(18:05 +0200)
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/format.c
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diff --git
a/sound/usb/format.c
b/sound/usb/format.c
index 5367cd1e52d9dac9231077e829ca3e0869175de4..df5b29fed00028b587fbe36b18c13c332c8aff31 100644
(file)
--- a/
sound/usb/format.c
+++ b/
sound/usb/format.c
@@
-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,