Author: hselasky
Date: Sun Jan 12 13:16:25 2014
New Revision: 260563
URL: http://svnweb.freebsd.org/changeset/base/260563
Log:
Make sure reserved fields of the EHCI DMA descriptors are not dirty
after previous transfers.
MFC after: 1 week
Modified:
head/sys/dev/usb/controller/ehci.c
Modified: head/sys/dev/usb/controller/ehci.c
==============================================================================
--- head/sys/dev/usb/controller/ehci.c Sun Jan 12 12:48:50 2014
(r260562)
+++ head/sys/dev/usb/controller/ehci.c Sun Jan 12 13:16:25 2014
(r260563)
@@ -1654,12 +1654,17 @@ restart:
}
td->len = 0;
+ /* properly reset reserved fields */
td->qtd_buffer[0] = 0;
- td->qtd_buffer_hi[0] = 0;
-
td->qtd_buffer[1] = 0;
+ td->qtd_buffer[2] = 0;
+ td->qtd_buffer[3] = 0;
+ td->qtd_buffer[4] = 0;
+ td->qtd_buffer_hi[0] = 0;
td->qtd_buffer_hi[1] = 0;
-
+ td->qtd_buffer_hi[2] = 0;
+ td->qtd_buffer_hi[3] = 0;
+ td->qtd_buffer_hi[4] = 0;
} else {
uint8_t x;
@@ -1714,6 +1719,12 @@ restart:
htohc32(temp->sc,
buf_res.physaddr & (~0xFFF));
td->qtd_buffer_hi[x] = 0;
+
+ /* properly reset reserved fields */
+ while (++x < EHCI_QTD_NBUFFERS) {
+ td->qtd_buffer[x] = 0;
+ td->qtd_buffer_hi[x] = 0;
+ }
}
if (td_next) {
@@ -2001,6 +2012,18 @@ ehci_setup_standard_chain(struct usb_xfe
qh->qh_qtd.qtd_altnext =
htohc32(temp.sc, EHCI_LINK_TERMINATE);
+ /* properly reset reserved fields */
+ qh->qh_qtd.qtd_buffer[0] = 0;
+ qh->qh_qtd.qtd_buffer[1] = 0;
+ qh->qh_qtd.qtd_buffer[2] = 0;
+ qh->qh_qtd.qtd_buffer[3] = 0;
+ qh->qh_qtd.qtd_buffer[4] = 0;
+ qh->qh_qtd.qtd_buffer_hi[0] = 0;
+ qh->qh_qtd.qtd_buffer_hi[1] = 0;
+ qh->qh_qtd.qtd_buffer_hi[2] = 0;
+ qh->qh_qtd.qtd_buffer_hi[3] = 0;
+ qh->qh_qtd.qtd_buffer_hi[4] = 0;
+
usb_pc_cpu_flush(qh->page_cache);
if (xfer->xroot->udev->flags.self_suspended == 0) {
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