Date: Thu, 5 Nov 2020 09:55:55 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r367365 - head/sys/arm64/arm64 Message-ID: <202011050955.0A59ttve044779@repo.freebsd.org>
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Author: andrew Date: Thu Nov 5 09:55:55 2020 New Revision: 367365 URL: https://svnweb.freebsd.org/changeset/base/367365 Log: Stop trying to bounce in memory allocated by bus dma Memory allocated by bus_dmamem_alloc will take into account any alignment requirements of the CPU it's running on. Stop trying to bounce in this case as there is no bounce zone allocated. Reported by: manu, tuexen Tested by: manu Sponsored by: Innovate UK Modified: head/sys/arm64/arm64/busdma_bounce.c Modified: head/sys/arm64/arm64/busdma_bounce.c ============================================================================== --- head/sys/arm64/arm64/busdma_bounce.c Thu Nov 5 08:58:21 2020 (r367364) +++ head/sys/arm64/arm64/busdma_bounce.c Thu Nov 5 09:55:55 2020 (r367365) @@ -206,6 +206,10 @@ might_bounce(bus_dma_tag_t dmat, bus_dmamap_t map, bus bus_size_t size) { + /* Memory allocated by bounce_bus_dmamem_alloc won't bounce */ + if ((map->flags & DMAMAP_FROM_DMAMEM) != 0) + return (false); + if ((dmat->bounce_flags & BF_COULD_BOUNCE) != 0) return (true);
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