xprtrdma: Disable completions for LOCAL_INV Work Requests

Instead of relying on a completion to change the state of an FRMR
to FRMR_IS_INVALID, set it in advance. If an error occurs, a completion
will fire anyway and mark the FRMR FRMR_IS_STALE.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Tested-by: Steve Wise <swise@opengridcomputing.com>
Tested-by: Shirley Ma <shirley.ma@oracle.com>
Tested-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

1 files changed, 8 insertions, 9 deletions

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 3e8b3881548d..08c92355c64c 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -154,12 +154,8 @@ rpcrdma_sendcq_process_wc(struct ib_wc *wc)
 
         if (wc->wr_id == 0ULL)
                 return;
-        if (wc->status != IB_WC_SUCCESS) {
+        if (wc->status != IB_WC_SUCCESS)
                 frmr->r.frmr.fr_state = FRMR_IS_STALE;
-                return;
-        }
-
-        frmr->r.frmr.fr_state = FRMR_IS_INVALID;
 }
 
 static int
@@ -1369,12 +1365,11 @@ rpcrdma_retry_local_inv(struct rpcrdma_mw *r, struct rpcrdma_ia *ia)
         dprintk("RPC:       %s: FRMR %p is stale\n", __func__, r);
 
         /* When this FRMR is re-inserted into rb_mws, it is no longer stale */
-        r->r.frmr.fr_state = FRMR_IS_VALID;
+        r->r.frmr.fr_state = FRMR_IS_INVALID;
 
         memset(&invalidate_wr, 0, sizeof(invalidate_wr));
         invalidate_wr.wr_id = (unsigned long)(void *)r;
         invalidate_wr.opcode = IB_WR_LOCAL_INV;
-        invalidate_wr.send_flags = IB_SEND_SIGNALED;
         invalidate_wr.ex.invalidate_rkey = r->r.frmr.fr_mr->rkey;
         DECR_CQCOUNT(&r_xprt->rx_ep);
 
@@ -1778,10 +1773,11 @@ rpcrdma_deregister_frmr_external(struct rpcrdma_mr_seg *seg,
         struct ib_send_wr invalidate_wr, *bad_wr;
         int rc;
 
+        seg1->mr_chunk.rl_mw->r.frmr.fr_state = FRMR_IS_INVALID;
+
         memset(&invalidate_wr, 0, sizeof invalidate_wr);
         invalidate_wr.wr_id = (unsigned long)(void *)seg1->mr_chunk.rl_mw;
         invalidate_wr.opcode = IB_WR_LOCAL_INV;
-        invalidate_wr.send_flags = IB_SEND_SIGNALED;
         invalidate_wr.ex.invalidate_rkey = seg1->mr_chunk.rl_mw->r.frmr.fr_mr->rkey;
         DECR_CQCOUNT(&r_xprt->rx_ep);
 
@@ -1790,9 +1786,12 @@ rpcrdma_deregister_frmr_external(struct rpcrdma_mr_seg *seg,
                 rpcrdma_unmap_one(ia, seg++);
         rc = ib_post_send(ia->ri_id->qp, &invalidate_wr, &bad_wr);
         read_unlock(&ia->ri_qplock);
-        if (rc)
+        if (rc) {
+                /* Force rpcrdma_buffer_get() to retry */
+                seg1->mr_chunk.rl_mw->r.frmr.fr_state = FRMR_IS_STALE;
                 dprintk("RPC:       %s: failed ib_post_send for invalidate,"
                         " status %i\n", __func__, rc);
+        }
         return rc;
 }