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authorClemens Ladisch <clemens@ladisch.de>2009-02-06 08:13:07 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2009-02-12 09:31:03 -0800
commit6106d9f94e0cf107af83b6514b1b193233314a33 (patch)
tree6d2c1800e36c329ce6df4e401fb3e1a73135dbe3 /sound
parent2bba098bf6965d597db52ba6e377413b4cc24086 (diff)
sound: usb-audio: handle wMaxPacketSize for FIXED_ENDPOINT devices
commit 894dcd78782842924527598b0b764c9b4e679e21 upstream. For audio devices that do not have proper audio descriptors (e.g., Edirol UA-20), we use hardcoded parameters from our quirks list. However, we must still read the maximum packet size from the standard endpoint descriptor; otherwise, we might use packets that are too big and therefore rejected by the USB core. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/usb/usbaudio.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index b8cfb7c22768..7a1a8c8245d0 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2958,6 +2958,7 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
return -EINVAL;
}
alts = &iface->altsetting[fp->altset_idx];
+ fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
usb_set_interface(chip->dev, fp->iface, 0);
init_usb_pitch(chip->dev, fp->iface, alts, fp);
init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);