4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Steve French <smfrench@xxxxxxxxx> commit 26c9cb668c7fbf9830516b75d8bee70b699ed449 upstream. Mac requires the unicode flag to be set for cifs, even for the smb echo request (which doesn't have strings). Without this Mac rejects the periodic echo requests (when mounting with cifs) that we use to check if server is down Signed-off-by: Steve French <smfrench@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/cifs/cifssmb.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -717,6 +717,9 @@ CIFSSMBEcho(struct TCP_Server_Info *serv if (rc) return rc; + if (server->capabilities & CAP_UNICODE) + smb->hdr.Flags2 |= SMBFLG2_UNICODE; + /* set up echo request */ smb->hdr.Tid = 0xffff; smb->hdr.WordCount = 1;