Date: Tue, 29 Jul 2014 02:37:32 +0000 (UTC) From: Ian Lepore <ian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r269215 - head/sys/arm/arm Message-ID: <201407290237.s6T2bWs5074580@svn.freebsd.org>
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Author: ian Date: Tue Jul 29 02:37:31 2014 New Revision: 269215 URL: http://svnweb.freebsd.org/changeset/base/269215 Log: We never need bounce pages for memory we allocate. We cleverly allocate memory the matches all the constraints of the dma tag so that bouncing will never be required. Reviewed by: cognet Modified: head/sys/arm/arm/busdma_machdep-v6.c Modified: head/sys/arm/arm/busdma_machdep-v6.c ============================================================================== --- head/sys/arm/arm/busdma_machdep-v6.c Tue Jul 29 02:37:24 2014 (r269214) +++ head/sys/arm/arm/busdma_machdep-v6.c Tue Jul 29 02:37:31 2014 (r269215) @@ -743,14 +743,6 @@ bus_dmamem_alloc(bus_dma_tag_t dmat, voi map->flags = DMAMAP_DMAMEM_ALLOC; map->sync_count = 0; - /* We may need bounce pages, even for allocated memory */ - error = allocate_bz_and_pages(dmat, map); - if (error != 0) { - free(map, M_DEVBUF); - *mapp = NULL; - return (error); - } - if (dmat->segments == NULL) { dmat->segments = (bus_dma_segment_t *)malloc( sizeof(bus_dma_segment_t) * dmat->nsegments, M_DEVBUF,
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