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| author | Takashi Iwai <tiwai@suse.de> | 2013-03-18 11:04:42 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2013-03-18 11:04:42 +0100 |
| commit | cf30f46acde1f84fbf603bba6540cbb40cc6c954 (patch) | |
| tree | 2652b3fd1fbc4c379ee5325579fe60eae75421f1 /sound/usb | |
| parent | 0959f22ee66734c212fc733f7616ba321ef7f47f (diff) | |
| parent | a86b1a2cd2f81f74e815e07f756edd7bc5b6f034 (diff) | |
| download | linux-cf30f46acde1f84fbf603bba6540cbb40cc6c954.tar.gz linux-cf30f46acde1f84fbf603bba6540cbb40cc6c954.tar.bz2 linux-cf30f46acde1f84fbf603bba6540cbb40cc6c954.zip | |
Merge branch 'for-linus' into for-next
Back-merged for refactoring beep stuff.
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/card.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c index 803953a9bff3..2da8ad75fd96 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -244,6 +244,21 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) usb_ifnum_to_if(dev, ctrlif)->intf_assoc; if (!assoc) { + /* + * Firmware writers cannot count to three. So to find + * the IAD on the NuForce UDH-100, also check the next + * interface. + */ + struct usb_interface *iface = + usb_ifnum_to_if(dev, ctrlif + 1); + if (iface && + iface->intf_assoc && + iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && + iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) + assoc = iface->intf_assoc; + } + + if (!assoc) { snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n"); return -EINVAL; } |