From 03bdae2d321d8f812347f253938ca56071313a5c Mon Sep 17 00:00:00 2001
From: hselasky <hselasky@FreeBSD.org>
Date: Wed, 5 Feb 2014 08:02:52 +0000
Subject: [PATCH] Fix a regression issue. Contiguous single segment allocations
 above PAGE_SIZE bytes should only use one USB page structure. Fixes a problem
 with some external drivers.

MFC after:	2 days
---
 sys/dev/usb/usb_busdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/usb/usb_busdma.c b/sys/dev/usb/usb_busdma.c
index 83b47cb76064..1c3628888ba8 100644
--- a/sys/dev/usb/usb_busdma.c
+++ b/sys/dev/usb/usb_busdma.c
@@ -452,7 +452,7 @@ usb_pc_common_mem_cb(void *arg, bus_dma_segment_t *segs,
 		goto done;
 	}
 #endif
-	while (1) {
+	while (pc->ismultiseg) {
 		off += USB_PAGE_SIZE;
 		if (off >= (segs->ds_len + rem)) {
 			/* page crossing */