smb3: do not display empty interface list

If server does not support listing interfaces then do not
display empty "Server interfaces" line to avoid confusing users.

Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Aurelien Aptel <aaptel@suse.com>

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index e8db245..bfe9995 100644 (file)
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -333,7 +333,9 @@ skip_rdma:
                        spin_unlock(&GlobalMid_Lock);
 
                        spin_lock(&ses->iface_lock);
-                       seq_printf(m, "\n\tServer interfaces: %zu\n", ses->iface_count);
+                       if (ses->iface_count)
+                               seq_printf(m, "\n\tServer interfaces: %zu\n",
+                                          ses->iface_count);
                        for (j = 0; j < ses->iface_count; j++) {
                                seq_printf(m, "\t%d)\n", j);
                                cifs_dump_iface(m, &ses->iface_list[j]);