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| author | Takashi Iwai <tiwai@suse.de> | 2010-02-17 14:22:21 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-02-17 14:22:21 +0100 |
| commit | 9d3415a8cc76ff65c6602a121ac318432c5cd7ba (patch) | |
| tree | 8b8482d8942d1ba5fb6d403010d4765577f25b07 /sound/usb | |
| parent | ALSA: Echoaudio, fix Guru Meditation #00000005.48454C50 (diff) | |
| parent | ALSA: pcm core - fix fifo_size channels interval check (diff) | |
| download | linux-9d3415a8cc76ff65c6602a121ac318432c5cd7ba.tar.xz linux-9d3415a8cc76ff65c6602a121ac318432c5cd7ba.zip | |
Merge remote branch 'alsa/fixes' into fix/misc
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/usbmidi.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c index 6e89b8368d9a..aae50df06232 100644 --- a/sound/usb/usbmidi.c +++ b/sound/usb/usbmidi.c @@ -1162,10 +1162,22 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi* umidi, pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep); else pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep); - if (umidi->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */ - ep->max_transfer = 4; - else + switch (umidi->usb_id) { + default: ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1); + break; + /* + * Various chips declare a packet size larger than 4 bytes, but + * do not actually work with larger packets: + */ + case USB_ID(0x0a92, 0x1020): /* ESI M4U */ + case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */ + case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */ + case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */ + case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */ + ep->max_transfer = 4; + break; + } for (i = 0; i < OUTPUT_URBS; ++i) { buffer = usb_buffer_alloc(umidi->dev, ep->max_transfer, GFP_KERNEL, |