Don't copy the data from bounce buffer back to the mbuf if channel does

not use bounce buffering.

Sponsored by:	DARPA, AFRL

This commit is contained in:

Ruslan Bukin

2019-05-29 16:01:34 +00:00

parent 7b4ec8d2fc

commit 33da49cd2e

1 changed files with 2 additions and 1 deletions

									
										sys/dev/xdma/xdma_sg.c
									
		+2
		-1
	
												View File
												
				@@ -348,7 +348,8 @@ 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);