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Commit 3bc6fbc7 authored by Daniel Mack's avatar Daniel Mack Committed by Takashi Iwai
Browse files

ALSA: usb-audio: assume valid clock 



If the interface can't report a clock's validity, assume that it's
valid.

Signed-off-by: default avatarDaniel Mack <zonque@gmail.com>
Reported-by: default avatarVicente Joel <vicentejoel@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 0ef28324

sound/usb/clock.c

+10 −1
Original line number Diff line number Diff line
@@ -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;