busdma_machdep_diff.txt

sepherosa, 07/13/2007 04:15 am

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--- busdma_machdep.c.orig	2007-07-13 12:07:26.073968370 +0800
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+++ busdma_machdep.c	2007-07-13 12:06:18.324898557 +0800
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@@ -45,7 +45,7 @@
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 #include <machine/md_var.h>
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-#define MAX_BPAGES 128
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+#define MAX_BPAGES 1024
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 struct bus_dma_tag {
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 	bus_dma_tag_t	  parent;
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@@ -289,9 +289,12 @@ bus_dmamap_create(bus_dma_tag_t dmat, in
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 				panic("bus_dmamap_create: page reallocation "
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 				      "not implemented");
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 			}
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-			pages = atop(dmat->maxsize);
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+
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+			pages = MAX(atop(dmat->maxsize), 1);
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 			pages = MIN(maxpages - total_bpages, pages);
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-			error = alloc_bounce_pages(dmat, pages);
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+			pages = MAX(pages, 1);
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+			if (alloc_bounce_pages(dmat, pages) < pages)
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+				error = ENOMEM;
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 			if ((dmat->flags & BUS_DMA_MIN_ALLOC_COMP) == 0) {
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 				if (error == 0)