Author: thompsa
Date: Fri Mar 20 22:15:22 2009
New Revision: 190188
URL: http://svn.freebsd.org/changeset/base/190188
Log:
MFp4 //depot/projects/usb @159423, 159497
- Return a Zero Length packet on read errors.
- Allow for smaller buffer size.
Submitted by: Hans Petter Selasky
Modified:
head/sys/dev/usb/usb_generic.c
Modified: head/sys/dev/usb/usb_generic.c
==============================================================================
--- head/sys/dev/usb/usb_generic.c Fri Mar 20 22:12:15 2009
(r190187)
+++ head/sys/dev/usb/usb_generic.c Fri Mar 20 22:15:22 2009
(r190188)
@@ -416,6 +416,8 @@ ugen_default_read_callback(struct usb2_x
default: /* Error */
if (xfer->error != USB_ERR_CANCELLED) {
+ /* send a zero length packet to userland */
+ usb2_fifo_put_data(f, xfer->frbuffers, 0, 0, 1);
f->flag_stall = 1;
f->fifo_zlp = 0;
usb2_transfer_start(f->xfer[1]);
@@ -1616,8 +1618,8 @@ ugen_set_buffer_size(struct usb2_fifo *f
{
usb2_frlength_t t;
- if (*(int *)addr < 1024)
- t = 1024;
+ if (*(int *)addr < 0)
+ t = 0; /* use "wMaxPacketSize" */
else if (*(int *)addr < (256 * 1024))
t = *(int *)addr;
else
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