Author: marius
Date: Sat Sep 18 08:25:12 2010
New Revision: 212819
URL: http://svn.freebsd.org/changeset/base/212819
Log:
MFC: r212621
Use saner nsegments and maxsegsz parameters when creating certain DMA tags;
tags for 1-byte allocations cannot possibly be split across 2 segments and
maxsegsz must not exceed maxsize.
Reviewed by: Hans Petter Selasky
Modified:
stable/8/sys/dev/usb/usb_busdma.c
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
stable/8/sys/dev/xen/xenpci/ (props changed)
Modified: stable/8/sys/dev/usb/usb_busdma.c
==============================================================================
--- stable/8/sys/dev/usb/usb_busdma.c Sat Sep 18 08:23:45 2010
(r212818)
+++ stable/8/sys/dev/usb/usb_busdma.c Sat Sep 18 08:25:12 2010
(r212819)
@@ -366,9 +366,9 @@ usb_dma_tag_create(struct usb_dma_tag *u
/* filter */ NULL,
/* filterarg */ NULL,
/* maxsize */ size,
- /* nsegments */ (align == 1) ?
+ /* nsegments */ (align == 1 && size > 1) ?
(2 + (size / USB_PAGE_SIZE)) : 1,
- /* maxsegsz */ (align == 1) ?
+ /* maxsegsz */ (align == 1 && size > USB_PAGE_SIZE) ?
USB_PAGE_SIZE : size,
/* flags */ BUS_DMA_KEEP_PG_OFFSET,
/* lockfn */ &usb_dma_lock_cb,
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