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>

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 c3e8db0eeb3b..d9183cbcd967 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;
 }
 
 /*