From 7816a902634cd707722181d6b8dc83d6ac94a953 Mon Sep 17 00:00:00 2001
From: Martin Pieuchot <mpi@cvs.openbsd.org>
Date: Tue, 8 Nov 2016 10:31:31 +0000
Subject: Remove superfluous DMA synchronization now that the stack is doing it
 for all HCs.

ok patrick@
---
 sys/dev/usb/ehci.c | 8 +-------
 sys/dev/usb/xhci.c | 5 +----
 2 files changed, 2 insertions(+), 11 deletions(-)

(limited to 'sys')

diff --git a/sys/dev/usb/ehci.c b/sys/dev/usb/ehci.c
index 5b5ddbebaff..b1e38923ce3 100644
--- a/sys/dev/usb/ehci.c
+++ b/sys/dev/usb/ehci.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ehci.c,v 1.194 2016/10/02 06:36:39 kettenis Exp $ */
+/*	$OpenBSD: ehci.c,v 1.195 2016/11/08 10:31:30 mpi Exp $ */
 /*	$NetBSD: ehci.c,v 1.66 2004/06/30 03:11:56 mycroft Exp $	*/
 
 /*
@@ -3102,9 +3102,6 @@ ehci_device_bulk_done(struct usbd_xfer *xfer)
 
 	if (xfer->status != USBD_NOMEM) {
 		ehci_free_sqtd_chain(sc, ex);
-		usb_syncmem(&xfer->dmabuf, 0, xfer->length,
-		    usbd_xfer_isread(xfer) ?
-		    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
 	}
 }
 
@@ -3265,9 +3262,6 @@ ehci_device_intr_done(struct usbd_xfer *xfer)
 		splx(s);
 	} else if (xfer->status != USBD_NOMEM) {
 		ehci_free_sqtd_chain(sc, ex);
-		usb_syncmem(&xfer->dmabuf, 0, xfer->length,
-		    usbd_xfer_isread(xfer) ?
-		    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
 	}
 }
 
diff --git a/sys/dev/usb/xhci.c b/sys/dev/usb/xhci.c
index 945ab1a5e33..b659b651cc7 100644
--- a/sys/dev/usb/xhci.c
+++ b/sys/dev/usb/xhci.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: xhci.c,v 1.69 2016/10/03 14:05:21 mpi Exp $ */
+/* $OpenBSD: xhci.c,v 1.70 2016/11/08 10:31:30 mpi Exp $ */
 
 /*
  * Copyright (c) 2014-2015 Martin Pieuchot
@@ -2661,9 +2661,6 @@ xhci_device_generic_start(struct usbd_xfer *xfer)
 void
 xhci_device_generic_done(struct usbd_xfer *xfer)
 {
-	usb_syncmem(&xfer->dmabuf, 0, xfer->length, usbd_xfer_isread(xfer) ?
-	    BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE);
-
 	/* Only happens with interrupt transfers. */
 	if (xfer->pipe->repeat) {
 		xfer->actlen = 0;
-- 
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