cephfs-top: display_menu() isn't triggered when all fs' are removed

Fixes: https://tracker.ceph.com/issues/58813
Signed-off-by: Neeraj Pratap Singh <neesingh@redhat.com>

diff --git a/src/tools/cephfs/top/cephfs-top b/src/tools/cephfs/top/cephfs-top
index 5461b9d759531866dced62a3fa4a3b527df8b2fe..e13f08074d9d1ecc21b78b2bcb15f73b2ae546cc 100755 (executable)
--- a/src/tools/cephfs/top/cephfs-top
+++ b/src/tools/cephfs/top/cephfs-top
@@ -445,13 +445,14 @@ class FSTop(FSTopBase):
         key = 0
         endwhile = False
         while not endwhile:
-            global current_states
+            global current_states, fs_list
+            fs_list = self.get_fs_names()
 
             if key == curses.KEY_UP and curr_row1 > 0:
                 curr_row1 -= 1
             elif key == curses.KEY_DOWN and curr_row1 < len(field_menu) - 1:
                 curr_row1 += 1
-            elif key == curses.KEY_ENTER or key in [10, 13]:
+            elif (key in [curses.KEY_ENTER, 10, 13]) and fs_list:
                 self.stdscr.erase()
                 if curr_row1 != len(field_menu) - 1:
                     current_states["last_field"] = (field_menu[curr_row1].split('='))[0]