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| author | yongari <yongari@FreeBSD.org> | 2007-05-29 06:30:26 +0000 |
|---|---|---|
| committer | yongari <yongari@FreeBSD.org> | 2007-05-29 06:30:26 +0000 |
| commit | f53195d29a8fff7695e0e7ba6e882a43ec827056 (patch) | |
| tree | 334f9ee040f34f0db530b0d463e04521ea658fb8 /sys/i386 | |
| parent | cfa8629c4850a5bd7d8ca034dd43c16a6e542ab2 (diff) | |
| download | FreeBSD-src-f53195d29a8fff7695e0e7ba6e882a43ec827056.zip FreeBSD-src-f53195d29a8fff7695e0e7ba6e882a43ec827056.tar.gz | |
Honor maxsegsz of less than a page size in a DMA tag. Previously it
used to return PAGE_SIZE without respect to restrictions of a DMA tag.
This affected all of the busdma load functions that use
_bus_dmamap_loader_buffer() as their back-end.
Reviewed by: scottl
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/busdma_machdep.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/i386/i386/busdma_machdep.c b/sys/i386/i386/busdma_machdep.c index 813e9ca..5d7c9cd 100644 --- a/sys/i386/i386/busdma_machdep.c +++ b/sys/i386/i386/busdma_machdep.c @@ -674,6 +674,8 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, * Compute the segment size, and adjust counts. */ sgsize = PAGE_SIZE - ((u_long)curaddr & PAGE_MASK); + if (sgsize > dmat->maxsegsz) + sgsize = dmat->maxsegsz; if (buflen < sgsize) sgsize = buflen; |
