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
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -333,7 +333,9 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
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]);