ChangeSet 1.778, 2002/12/05 14:19:47-08:00, [EMAIL PROTECTED]
[PATCH] usb-midi patch for 2.4.20-pre11
Please, apply the attached patch for usb-midi.c (Linux kernel 2.4.20-pre11)
This patch solves some problems with MIDI IN:
- System exclusive messages corrupted.
- Other MIDI messages lost (mainly simultaneous notes).
diff -Nru a/drivers/usb/usb-midi.c b/drivers/usb/usb-midi.c
--- a/drivers/usb/usb-midi.c Thu Dec 5 14:48:50 2002
+++ b/drivers/usb/usb-midi.c Thu Dec 5 14:48:50 2002
@@ -370,7 +370,7 @@
{
struct midi_in_endpoint *ep = (struct midi_in_endpoint *)(urb->context);
unsigned char *data = urb->transfer_buffer;
- int i, l, wake;
+ int i, j, wake;
unsigned long int flags;
if ( !ep->urbSubmitted ) {
@@ -381,14 +381,14 @@
wake = 0;
spin_lock_irqsave( &ep->lock, flags );
- for(l = 0; l < urb->actual_length; l += 4) {
- int cin = (data[l]>>0)&0xf;
- int cab = (data[l]>>4)&0xf;
+ for(j = 0; j < urb->actual_length; j += 4) {
+ int cin = (data[j]>>0)&0xf;
+ int cab = (data[j]>>4)&0xf;
struct usb_mididev *cable = ep->cables[cab];
if ( cable ) {
int len = cin_to_len[cin]; /** length of MIDI data **/
for (i = 0; i < len; i++) {
- cable->min.buf[cable->min.bufWrPtr] =
data[1+i];
+ cable->min.buf[cable->min.bufWrPtr] =
+data[1+i+j];
cable->min.bufWrPtr =
(cable->min.bufWrPtr+1)%MIDI_IN_BUFSIZ;
if (cable->min.bufRemains < MIDI_IN_BUFSIZ)
cable->min.bufRemains += 1;
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