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| author |   David S. Miller <davem@davemloft.net> | 2013-03-20 12:46:26 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-03-20 12:46:26 -0400 |
| commit | 61816596d1c9026d0ecb20c44f90452c41596ffe (patch) | |
| tree | 3027ed6dc62f71e14b9d525405747fa0eb8f074d /sound/usb/card.c | |
| parent | net: fix psock_fanout selftest hash collision (diff) | |
| parent | net: fec: Define indexes as 'unsigned int' (diff) | |
| download | linux-dev-61816596d1c9026d0ecb20c44f90452c41596ffe.tar.xz linux-dev-61816596d1c9026d0ecb20c44f90452c41596ffe.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull in the 'net' tree to get Daniel Borkmann's flow dissector
infrastructure change.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'sound/usb/card.c')
| -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; } |