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authorTom Tucker <tom@opengridcomputing.com>2008-09-30 14:05:41 -0500
committerTom Tucker <tom@opengridcomputing.com>2008-10-06 14:45:52 -0500
commita5abf4e81545d9c7280c49cae853cc45fd769ddf (patch)
treefef48a88715bac9bfdca3e00aa1ed6afb1177004 /net/sunrpc/xprtrdma
parente1183210625cc8e02ce13eec78fb7a246567fc59 (diff)
downloadop-kernel-dev-a5abf4e81545d9c7280c49cae853cc45fd769ddf.zip
op-kernel-dev-a5abf4e81545d9c7280c49cae853cc45fd769ddf.tar.gz
svcrdma: Modify post recv path to use local dma key
Update the svc_rdma_post_recv routine to use the adapter's global LKEY instead of sc_phys_mr which is only valid when using a DMA MR. Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_transport.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index c3e8db0..d9183cb 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -483,7 +483,7 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
struct ib_recv_wr recv_wr, *bad_recv_wr;
struct svc_rdma_op_ctxt *ctxt;
struct page *page;
- unsigned long pa;
+ dma_addr_t pa;
int sge_no;
int buflen;
int ret;
@@ -495,13 +495,15 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
BUG_ON(sge_no >= xprt->sc_max_sge);
page = svc_rdma_get_page();
ctxt->pages[sge_no] = page;
- atomic_inc(&xprt->sc_dma_used);
pa = ib_dma_map_page(xprt->sc_cm_id->device,
page, 0, PAGE_SIZE,
DMA_FROM_DEVICE);
+ if (ib_dma_mapping_error(xprt->sc_cm_id->device, pa))
+ goto err_put_ctxt;
+ atomic_inc(&xprt->sc_dma_used);
ctxt->sge[sge_no].addr = pa;
ctxt->sge[sge_no].length = PAGE_SIZE;
- ctxt->sge[sge_no].lkey = xprt->sc_phys_mr->lkey;
+ ctxt->sge[sge_no].lkey = xprt->sc_dma_lkey;
buflen += PAGE_SIZE;
}
ctxt->count = sge_no;
@@ -517,6 +519,10 @@ int svc_rdma_post_recv(struct svcxprt_rdma *xprt)
svc_rdma_put_context(ctxt, 1);
}
return ret;
+
+ err_put_ctxt:
+ svc_rdma_put_context(ctxt, 1);
+ return -ENOMEM;
}
/*
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