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-rw-r--r--sound/usb/quirks.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 5b01330b8452..1bc45e71f1fe 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -129,6 +129,7 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
{
struct audioformat *fp;
struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
int stream, err;
unsigned *rate_table = NULL;
@@ -166,6 +167,9 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
return -EINVAL;
}
alts = &iface->altsetting[fp->altset_idx];
+ altsd = get_iface_desc(alts);
+ fp->protocol = altsd->bInterfaceProtocol;
+
if (fp->datainterval == 0)
fp->datainterval = snd_usb_parse_datainterval(chip, alts);
if (fp->maxpacksize == 0)