SUNRPC: Silence WARN_ON when NFSv4.1 over RDMA is in use

Using NFSv4.1 on RDMA should be safe, so broaden the new checks in
rpc_create().

WARN_ON_ONCE is used, matching most other WARN call sites in clnt.c.

Fixes: 39a9beab5acb ("rpc: share one xps between all backchannels")
Fixes: d50039ea5ee6 ("nfsd4/rpc: move backchannel create logic...")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 7f79fb7dc6a0..66f23b376fa0 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -453,7 +453,7 @@ static struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args,
         struct rpc_xprt_switch *xps;
 
         if (args->bc_xprt && args->bc_xprt->xpt_bc_xps) {
-                WARN_ON(args->protocol != XPRT_TRANSPORT_BC_TCP);
+                WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC));
                 xps = args->bc_xprt->xpt_bc_xps;
                 xprt_switch_get(xps);
         } else {
@@ -520,7 +520,7 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
         char servername[48];
 
         if (args->bc_xprt) {
-                WARN_ON(args->protocol != XPRT_TRANSPORT_BC_TCP);
+                WARN_ON_ONCE(!(args->protocol & XPRT_TRANSPORT_BC));
                 xprt = args->bc_xprt->xpt_bc_xprt;
                 if (xprt) {
                         xprt_get(xprt);