svcrdma: Post Receives only for forward channel requests

Since backward direction support was added, the rq_depth was
increased to accommodate both forward and backward Receives.

But only forward Receives need to be posted after a connection
has been accepted. Receives for backward replies are posted as
needed by svc_rdma_bc_sendto().

This doesn't break anything, but it means some resources are
wasted.

Fixes: 03fe9931536f ('svcrdma: Define maximum number of ...')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index d2680b87d162d748c73c6fed7b7fe4fab53377ba..02a112c7cb6ac278aa37e5e7770460fd47b16493 100644 (file)
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -1083,7 +1083,7 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt)
                newxprt->sc_dev_caps |= SVCRDMA_DEVCAP_READ_W_INV;
 
        /* Post receive buffers */
-       for (i = 0; i < newxprt->sc_rq_depth; i++) {
+       for (i = 0; i < newxprt->sc_max_requests; i++) {
                ret = svc_rdma_post_recv(newxprt, GFP_KERNEL);
                if (ret) {
                        dprintk("svcrdma: failure posting receive buffers\n");