1 files changed, 11 insertions, 0 deletions

diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 526fb89f9230..d1fdfa848703 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -372,6 +372,16 @@ coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
         return 0;
 }
 
+static void
+cifs_downgrade_oplock(struct TCP_Server_Info *server,
+                        struct cifsInodeInfo *cinode, bool set_level2)
+{
+        if (set_level2)
+                cifs_set_oplock_level(cinode, OPLOCK_READ);
+        else
+                cifs_set_oplock_level(cinode, 0);
+}
+
 static bool
 cifs_check_trans2(struct mid_q_entry *mid, struct TCP_Server_Info *server,
                   char *buf, int malformed)
@@ -1019,6 +1029,7 @@ struct smb_version_operations smb1_operations = {
         .clear_stats = cifs_clear_stats,
         .print_stats = cifs_print_stats,
         .is_oplock_break = is_valid_oplock_break,
+        .downgrade_oplock = cifs_downgrade_oplock,
         .check_trans2 = cifs_check_trans2,
         .need_neg = cifs_need_neg,
         .negotiate = cifs_negotiate,