If the interface can't report a clock's validity, assume that it's valid.
Signed-off-by: Daniel Mack zonque@gmail.com Reported-by: Vicente Joel vicentejoel@gmail.com --- sound/usb/clock.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/sound/usb/clock.c b/sound/usb/clock.c index 7754a10..075195e 100644 --- a/sound/usb/clock.c +++ b/sound/usb/clock.c @@ -104,6 +104,15 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id) int err; unsigned char data; struct usb_device *dev = chip->dev; + struct uac_clock_source_descriptor *cs_desc = + snd_usb_find_clock_source(chip->ctrl_intf, source_id); + + if (!cs_desc) + return 0; + + /* If a clock source can't tell us whether it's valid, we assume it is */ + if (!uac2_control_is_readable(cs_desc->bmControls, UAC2_CS_CONTROL_CLOCK_VALID)) + return 1;
err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, @@ -114,7 +123,7 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id) if (err < 0) { snd_printk(KERN_WARNING "%s(): cannot get clock validity for id %d\n", __func__, source_id); - return err; + return 0; }
return !!data;