DragonFlyBSD

--- busdma_machdep.c.orig 2007-07-13 12:07:26.073968370 +0800

+++ busdma_machdep.c 2007-07-13 12:06:18.324898557 +0800

@@ -45,7 +45,7 @@

#include <machine/md_var.h>

-#define MAX_BPAGES 128

+#define MAX_BPAGES 1024

struct bus_dma_tag {

bus_dma_tag_t parent;

@@ -289,9 +289,12 @@ bus_dmamap_create(bus_dma_tag_t dmat, in

panic("bus_dmamap_create: page reallocation "

"not implemented");

}

- pages = atop(dmat->maxsize);

+

+ pages = MAX(atop(dmat->maxsize), 1);

pages = MIN(maxpages - total_bpages, pages);

- error = alloc_bounce_pages(dmat, pages);

+ pages = MAX(pages, 1);

+ if (alloc_bounce_pages(dmat, pages) < pages)

+ error = ENOMEM;

if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) {

if (error == 0)