The enable parameter doesn't seem to work as expected. Even when the enable parameter is set to false in /etc/modprobe.d/alsa-base.conf like "options snd-usb-audio index=-2 vid=0x1415 pid=0x1d27 enable=0", the specified device is not disabled.
This patch fixes the enable parameter behavior to disable the device correctly.
Signed-off-by: Tamaki Nishino otamachan@gmail.com --- sound/usb/card.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/sound/usb/card.c b/sound/usb/card.c index 23d1d23..8018d56 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -585,15 +585,24 @@ static int usb_audio_probe(struct usb_interface *intf, * now look for an empty slot and create a new card instance */ for (i = 0; i < SNDRV_CARDS; i++) - if (enable[i] && ! usb_chip[i] && + if (!usb_chip[i] && (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { - err = snd_usb_audio_create(intf, dev, i, quirk, - id, &chip); - if (err < 0) + if (enable[i]) { + err = snd_usb_audio_create(intf, dev, i, quirk, + id, &chip); + if (err < 0) + goto __error; + chip->pm_intf = intf; + break; + } else if (vid[i] != -1 || pid[i] != -1) { + dev_info(&dev->dev, + "device (%04x:%04x) is disabled\n", + USB_ID_VENDOR(id), + USB_ID_PRODUCT(id)); + err = -ENOENT; goto __error; - chip->pm_intf = intf; - break; + } } if (!chip) { dev_err(&dev->dev, "no available usb audio device\n");