PERFORCE change 157296 for review
Hans Petter Selasky
hselasky at FreeBSD.org
Fri Feb 6 11:45:16 PST 2009
http://perforce.freebsd.org/chv.cgi?CH=157296
Change 157296 by hselasky at hselasky_laptop001 on 2009/02/06 19:44:23
Fix OHCI and EHCI counting bug when multiple TD's are involved in
a short USB transfer and a short packet happens on the non-last
TD in the USB transfer frame.
Fix by: HPS
Reported by: Andrew Thompson
Affected files ...
.. //depot/projects/usb/src/sys/dev/usb2/controller/ehci2.c#30 edit
.. //depot/projects/usb/src/sys/dev/usb2/controller/ohci2.c#27 edit
Differences ...
==== //depot/projects/usb/src/sys/dev/usb2/controller/ehci2.c#30 (text+ko) ====
@@ -1145,6 +1145,9 @@
td = xfer->td_transfer_cache;
td_alt_next = td->alt_next;
+ if (xfer->aframes != xfer->nframes) {
+ xfer->frlengths[xfer->aframes] = 0;
+ }
while (1) {
usb2_pc_cpu_invalidate(td->page_cache);
@@ -1153,8 +1156,8 @@
len = EHCI_QTD_GET_BYTES(status);
/*
- * Verify the status length and subtract
- * the remainder from "frlengths[]":
+ * Verify the status length and
+ * add the length to "frlengths[]":
*/
if (len > td->len) {
/* should not happen */
@@ -1162,7 +1165,7 @@
"0x%04x/0x%04x bytes\n", len, td->len);
status |= EHCI_QTD_HALTED;
} else if (xfer->aframes != xfer->nframes) {
- xfer->frlengths[xfer->aframes] -= len;
+ xfer->frlengths[xfer->aframes] += td->len - len;
}
/* Check for last transfer */
if (((void *)td) == xfer->td_transfer_last) {
==== //depot/projects/usb/src/sys/dev/usb2/controller/ohci2.c#27 (text+ko) ====
@@ -838,6 +838,9 @@
td_alt_next = td->alt_next;
td_flags = 0;
+ if (xfer->aframes != xfer->nframes) {
+ xfer->frlengths[xfer->aframes] = 0;
+ }
while (1) {
usb2_pc_cpu_invalidate(td->page_cache);
@@ -861,10 +864,15 @@
cc = OHCI_CC_STALL;
} else if (xfer->aframes != xfer->nframes) {
/*
- * subtract remaining length from
- * "frlengths[]"
+ * Sum up total transfer length
+ * in "frlengths[]":
*/
- xfer->frlengths[xfer->aframes] -= temp;
+ xfer->frlengths[xfer->aframes] += td->len - temp;
+ }
+ } else{
+ if (xfer->aframes != xfer->nframes) {
+ /* transfer was complete */
+ xfer->frlengths[xfer->aframes] += td->len;
}
}
/* Check for last transfer */
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