cifs: empty interface list when server doesn't support query interfaces

commit 896cd316b841053f6df95ab77b5f1322c16a8e18 upstream.

When querying server interfaces returns -EOPNOTSUPP,
clear the list of interfaces. Assumption is that multichannel
would be disabled too.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 4cb0ebe7330ebea305583b912e96a7902673caee..68e783272c629c5c216d79dc74ba98c81cc2e3e0 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -587,7 +587,7 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
        if (rc == -EOPNOTSUPP) {
                cifs_dbg(FYI,
                         "server does not support query network interfaces\n");
-               goto out;
+               ret_data_len = 0;
        } else if (rc != 0) {
                cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
                goto out;