From: Steve French <stfrench@microsoft.com>
Date: Thu, 14 Jun 2018 21:59:31 -0500
Subject: [PATCH] smb3: do not display empty interface list
Git-commit: 115d5d288dc3368e3d6e7eb9ee213b342f072c23
Patch-mainline: v4.18-rc1
References: bsc#1144333

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>
Acked-by: Aurelien Aptel <aaptel@suse.com>
---
 fs/cifs/cifs_debug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index e8db245194e7..bfe999505815 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]);
-- 
2.16.4