diff options
| author | Karsten Wiese <fzu@wemgehoertderstaat.de> | 2011-01-03 02:41:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 14:46:37 -0800 |
| commit | 5625ceb657a9963f23d2cd3ea17f5a202da5db05 (patch) | |
| tree | 3279daa742bdeb93639c11e3761c8a9863f8fa2b /sound | |
| parent | f72daeb6eb832b6276a9da367b97dfdbcf204a49 (diff) | |
ALSA: snd-usb-us122l: Fix MIDI output
commit 921eebdc18c82268eab446592191b39e35d031d6 upstream.
The US-122L always reads 9 bytes per urb unless they are set to 0xFD.
Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.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/midi.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sound/usb/midi.c b/sound/usb/midi.c index b9c2bc65f51..0eb1ade8734 100644 --- a/sound/usb/midi.c +++ b/sound/usb/midi.c @@ -843,8 +843,8 @@ static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep, return; } - memset(urb->transfer_buffer + count, 0xFD, 9 - count); - urb->transfer_buffer_length = count; + memset(urb->transfer_buffer + count, 0xFD, ep->max_transfer - count); + urb->transfer_buffer_length = ep->max_transfer; } static struct usb_protocol_ops snd_usbmidi_122l_ops = { @@ -1288,6 +1288,13 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi, case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */ ep->max_transfer = 4; break; + /* + * Some devices only work with 9 bytes packet size: + */ + case USB_ID(0x0644, 0x800E): /* Tascam US-122L */ + case USB_ID(0x0644, 0x800F): /* Tascam US-144 */ + ep->max_transfer = 9; + break; } for (i = 0; i < OUTPUT_URBS; ++i) { buffer = usb_alloc_coherent(umidi->dev, |