svn commit: r261505 - head/sys/dev/usb

[Hans Petter Selasky]

Author: hselasky
Date: Wed Feb  5 08:02:52 2014
New Revision: 261505
URL: http://svnweb.freebsd.org/changeset/base/261505

Log:
  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

Modified:
  head/sys/dev/usb/usb_busdma.c

Modified: head/sys/dev/usb/usb_busdma.c
==============================================================================
--- head/sys/dev/usb/usb_busdma.c	Wed Feb  5 04:39:03 2014	(r261504)
+++ head/sys/dev/usb/usb_busdma.c	Wed Feb  5 08:02:52 2014	(r261505)
@@ -452,7 +452,7 @@ usb_pc_common_mem_cb(void *arg, bus_dma_
 		goto done;
 	}
 #endif
-	while (1) {
+	while (pc->ismultiseg) {
 		off += USB_PAGE_SIZE;
 		if (off >= (segs->ds_len + rem)) {
 			/* page crossing */