The usbfs code path for submitting Isochronous URBs still limits
each packet to 1k. This may have been appropriate for USB 1.1, but
high-speed devices sending multiple physical packets per microframe
may require a much larger "packet" size. This increases the limit
to 6144, sufficient for three 2k packets per microframe.
Signed-off-by: Micah Dowty <[EMAIL PROTECTED]>
--- .pc/usbiso-1k-limit/drivers/usb/core/devio.c 2006-01-27
14:03:56.000000000 -0800
+++ drivers/usb/core/devio.c 2006-01-27 14:03:58.000000000 -0800
@@ -928,7 +928,11 @@
return -EFAULT;
}
for (totlen = u = 0; u < uurb->number_of_packets; u++) {
- if (isopkt[u].length > 1023) {
+ /*
+ * Must be big enough for the largest possible packet
with mult=2,
+ * in order to support high-bandwidth USB2 modes.
+ */
+ if (isopkt[u].length > 6144) {
kfree(isopkt);
return -EINVAL;
}
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