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authorTakashi Iwai <tiwai@suse.de>2010-02-17 14:22:21 +0100
committerTakashi Iwai <tiwai@suse.de>2010-02-17 14:22:21 +0100
commit9d3415a8cc76ff65c6602a121ac318432c5cd7ba (patch)
tree8b8482d8942d1ba5fb6d403010d4765577f25b07 /sound/usb
parentb721e68bdc5b39c51bf6a1469f8d3663fbe03243 (diff)
parent3be522a9514f58e0596db34898a514df206cadc5 (diff)
Merge remote branch 'alsa/fixes' into fix/misc
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/usbmidi.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/sound/usb/usbmidi.c b/sound/usb/usbmidi.c
index 6e89b8368d9..aae50df0623 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,