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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>
This commit is contained in:
Steve Wise 2009-04-03 15:18:24 -05:00 committed by J. Bruce Fields
parent 0910697403
commit d0687be7c7
1 changed files with 1 additions and 1 deletions
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2
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
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@ -265,7 +265,7 @@ static int fast_reg_read_chunks(struct svcxprt_rdma *xprt,
frmr->page_list->page_list[page_no] = frmr->page_list->page_list[page_no] =
ib_dma_map_single(xprt->sc_cm_id->device, ib_dma_map_single(xprt->sc_cm_id->device,
page_address(rqstp->rq_arg.pages[page_no]), 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, if (ib_dma_mapping_error(xprt->sc_cm_id->device,
frmr->page_list->page_list[page_no])) frmr->page_list->page_list[page_no]))
goto fatal_err; goto fatal_err;