From: Clemens Ladisch Date: Fri, 6 Feb 2009 07:13:07 +0000 (+0100) Subject: sound: usb-audio: handle wMaxPacketSize for FIXED_ENDPOINT devices X-Git-Tag: v5.15~35309^2^2 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=894dcd78782842924527598b0b764c9b4e679e21;p=mirror_ubuntu-kernels.git sound: usb-audio: handle wMaxPacketSize for FIXED_ENDPOINT devices 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 Cc: Signed-off-by: Takashi Iwai --- diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index c709b9563226..2ab83129d9b0 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -2966,6 +2966,7 @@ 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);