xprtrdma: Remove rpcrdma_rep::rr_len

This field is no longer used outside the Receive completion handler.

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

3 files changed, 5 insertions, 11 deletions

diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c
index e422c0f63a69..621986156495 100644
--- a/net/sunrpc/xprtrdma/rpc_rdma.c
+++ b/net/sunrpc/xprtrdma/rpc_rdma.c
@@ -1178,7 +1178,7 @@ rpcrdma_reply_handler(struct work_struct *work)
 
         dprintk("RPC:       %s: incoming rep %p\n", __func__, rep);
 
-        if (rep->rr_len == RPCRDMA_BAD_LEN)
+        if (rep->rr_hdrbuf.head[0].iov_len == 0)
                 goto out_badstatus;
 
         xdr_init_decode(xdr, &rep->rr_hdrbuf,
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 74dbba84ad38..5d36c066552d 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -143,9 +143,6 @@ rpcrdma_update_granted_credits(struct rpcrdma_rep *rep)
         struct rpcrdma_buffer *buffer = &rep->rr_rxprt->rx_buf;
         u32 credits;
 
-        if (rep->rr_len < RPCRDMA_HDRLEN_ERR)
-                return;
-
         credits = be32_to_cpu(rmsgp->rm_credit);
         if (credits == 0)
                 credits = 1;    /* don't deadlock */
@@ -176,16 +173,16 @@ rpcrdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
         dprintk("RPC:       %s: rep %p opcode 'recv', length %u: success\n",
                 __func__, rep, wc->byte_len);
 
-        rep->rr_len = wc->byte_len;
         rpcrdma_set_xdrlen(&rep->rr_hdrbuf, wc->byte_len);
         rep->rr_wc_flags = wc->wc_flags;
         rep->rr_inv_rkey = wc->ex.invalidate_rkey;
 
         ib_dma_sync_single_for_cpu(rdmab_device(rep->rr_rdmabuf),
                                    rdmab_addr(rep->rr_rdmabuf),
-                                   rep->rr_len, DMA_FROM_DEVICE);
+                                   wc->byte_len, DMA_FROM_DEVICE);
 
-        rpcrdma_update_granted_credits(rep);
+        if (wc->byte_len >= RPCRDMA_HDRLEN_ERR)
+                rpcrdma_update_granted_credits(rep);
 
 out_schedule:
         queue_work(rpcrdma_receive_wq, &rep->rr_work);
@@ -196,7 +193,7 @@ out_fail:
                 pr_err("rpcrdma: Recv: %s (%u/0x%x)\n",
                        ib_wc_status_msg(wc->status),
                        wc->status, wc->vendor_err);
-        rep->rr_len = RPCRDMA_BAD_LEN;
+        rpcrdma_set_xdrlen(&rep->rr_hdrbuf, 0);
         goto out_schedule;
 }
 
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 13556ae11eec..d4a897af9d9b 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -218,7 +218,6 @@ enum {
 
 struct rpcrdma_rep {
         struct ib_cqe           rr_cqe;
-        unsigned int            rr_len;
         int                     rr_wc_flags;
         u32                     rr_inv_rkey;
         struct rpcrdma_xprt     *rr_rxprt;
@@ -230,8 +229,6 @@ struct rpcrdma_rep {
         struct rpcrdma_regbuf   *rr_rdmabuf;
 };
 
-#define RPCRDMA_BAD_LEN         (~0U)
-
 /*
  * struct rpcrdma_mw - external memory region metadata
  *