xprtrdma: Do not wait if ib_post_send() fails

If ib_post_send() in ro_unmap_sync() fails, the WRs have not been
posted, no completions will fire, and wait_for_completion() will
wait forever. Skip the wait in that case.

To ensure the MRs are invalid, disconnect.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index e165673..ecb005f 100644 (file)
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -520,14 +520,18 @@ frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req)
         * unless ri_id->qp is a valid pointer.
         */
        rc = ib_post_send(ia->ri_id->qp, invalidate_wrs, &bad_wr);
-       if (rc)
+       if (rc) {
                pr_warn("%s: ib_post_send failed %i\n", __func__, rc);
+               rdma_disconnect(ia->ri_id);
+               goto unmap;
+       }
 
        wait_for_completion(&f->fr_linv_done);
 
        /* ORDER: Now DMA unmap all of the req's MRs, and return
         * them to the free MW list.
         */
+unmap:
        for (i = 0, nchunks = req->rl_nchunks; nchunks; nchunks--) {
                seg = &req->rl_segments[i];