Date: Tue, 4 Jun 2019 17:42:48 +0000 (UTC) From: Ruslan Bukin <br@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r348650 - stable/12/sys/dev/xdma Message-ID: <201906041742.x54HgmZD008550@repo.freebsd.org>
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Author: br Date: Tue Jun 4 17:42:47 2019 New Revision: 348650 URL: https://svnweb.freebsd.org/changeset/base/348650 Log: MFC r348364: Don't copy the data from bounce buffer back to the mbuf if channel does not use bounce buffering. Sponsored by: DARPA, AFRL Modified: stable/12/sys/dev/xdma/xdma_sg.c Modified: stable/12/sys/dev/xdma/xdma_sg.c ============================================================================== --- stable/12/sys/dev/xdma/xdma_sg.c Tue Jun 4 17:39:46 2019 (r348649) +++ stable/12/sys/dev/xdma/xdma_sg.c Tue Jun 4 17:42:47 2019 (r348650) @@ -345,7 +345,8 @@ xchan_seg_done(xdma_channel_t *xchan, BUS_DMASYNC_POSTREAD); bus_dmamap_unload(xchan->dma_tag_bufs, b->map); } else { - if (xr->req_type == XR_TYPE_MBUF && + if ((xchan->caps & XCHAN_CAP_NOBUFS) == 0 && + xr->req_type == XR_TYPE_MBUF && xr->direction == XDMA_DEV_TO_MEM) m_copyback(xr->m, 0, st->transferred, (void *)xr->buf.vaddr);
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