Commit d0687be7 authored Apr 03, 2009 by Steve Wise Committed by J. Bruce Fields Apr 25, 2009

svcrdma: Fix dma map direction for rdma read targets



The nfs server rdma transport was mapping rdma read target pages for
TO_DEVICE instead of FROM_DEVICE.  This causes data corruption on non
cache-coherent systems if frmrs are used.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

parent 09106974

net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -265,7 +265,7 @@ static int fast_reg_read_chunks(struct svcxprt_rdma *xprt,
		frmr->page_list->page_list[page_no] =
		ib_dma_map_single(xprt->sc_cm_id->device,
		page_address(rqstp->rq_arg.pages[page_no]),
		PAGE_SIZE, DMA_TO_DEVICE);
		PAGE_SIZE, DMA_FROM_DEVICE);
		if (ib_dma_mapping_error(xprt->sc_cm_id->device,
		frmr->page_list->page_list[page_no]))
		goto fatal_err;