ALSA: usb-audio: assume valid clock
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> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -104,6 +104,15 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
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int err;
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unsigned char data;
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struct usb_device *dev = chip->dev;
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struct uac_clock_source_descriptor *cs_desc =
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snd_usb_find_clock_source(chip->ctrl_intf, source_id);
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if (!cs_desc)
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return 0;
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/* If a clock source can't tell us whether it's valid, we assume it is */
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if (!uac2_control_is_readable(cs_desc->bmControls, UAC2_CS_CONTROL_CLOCK_VALID))
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return 1;
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err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
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USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
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@ -114,7 +123,7 @@ static bool uac_clock_source_is_valid(struct snd_usb_audio *chip, int source_id)
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if (err < 0) {
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snd_printk(KERN_WARNING "%s(): cannot get clock validity for id %d\n",
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__func__, source_id);
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return err;
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return 0;
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}
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return !!data;
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