ALSA: usb-audio: fix regression for fixed stream quirk
authorEldad Zack <eldad@fogrefinery.com>
Tue, 9 Jul 2013 18:36:15 +0000 (20:36 +0200)
committerTakashi Iwai <tiwai@suse.de>
Wed, 10 Jul 2013 15:52:14 +0000 (17:52 +0200)
Commit 8f898e92aea2c24c7f379ee265d178f69ebb9c07 removed the redundant
reads of bInterfaceProtocol from the descriptors, but introduced a
regression to devices with quirks of type QUIRK_AUDIO_FIXED_ENDPOINT,
since fp->protocol is not set in setup process.

As a consequence, audio streams would not get initialized, as the
following logs show:

[   48.923043] setting usb interface 3:1
[   48.923056] Creating new capture data endpoint #81
[   48.923484] 4:3:1: cannot set freq 48000 to ep 0x81

This patch sets fp->protocol in create_fixed_stream_quirk() and
resolves the regression.

Signed-off-by: Eldad Zack <eldad@fogrefinery.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/quirks.c

index 5b01330b84529bfe9ebcdf43804e892982a830ab..1bc45e71f1fe0217d25ad6b85edd396458cf123d 100644 (file)
@@ -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)