diff options
| -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, | |||
| 1162 | pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep); | 1162 | pipe = usb_sndintpipe(umidi->dev, ep_info->out_ep); |
| 1163 | else | 1163 | else |
| 1164 | pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep); | 1164 | pipe = usb_sndbulkpipe(umidi->dev, ep_info->out_ep); |
| 1165 | if (umidi->usb_id == USB_ID(0x0a92, 0x1020)) /* ESI M4U */ | 1165 | switch (umidi->usb_id) { |
| 1166 | ep->max_transfer = 4; | 1166 | default: |
| 1167 | else | ||
| 1168 | ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1); | 1167 | ep->max_transfer = usb_maxpacket(umidi->dev, pipe, 1); |
| 1168 | break; | ||
| 1169 | /* | ||
| 1170 | * Various chips declare a packet size larger than 4 bytes, but | ||
| 1171 | * do not actually work with larger packets: | ||
| 1172 | */ | ||
| 1173 | case USB_ID(0x0a92, 0x1020): /* ESI M4U */ | ||
| 1174 | case USB_ID(0x1430, 0x474b): /* RedOctane GH MIDI INTERFACE */ | ||
| 1175 | case USB_ID(0x15ca, 0x0101): /* Textech USB Midi Cable */ | ||
| 1176 | case USB_ID(0x15ca, 0x1806): /* Textech USB Midi Cable */ | ||
| 1177 | case USB_ID(0x1a86, 0x752d): /* QinHeng CH345 "USB2.0-MIDI" */ | ||
| 1178 | ep->max_transfer = 4; | ||
| 1179 | break; | ||
| 1180 | } | ||
| 1169 | for (i = 0; i < OUTPUT_URBS; ++i) { | 1181 | for (i = 0; i < OUTPUT_URBS; ++i) { |
| 1170 | buffer = usb_buffer_alloc(umidi->dev, | 1182 | buffer = usb_buffer_alloc(umidi->dev, |
| 1171 | ep->max_transfer, GFP_KERNEL, | 1183 | ep->max_transfer, GFP_KERNEL, |
