NTB: ntb_transport: fix debugfs_remove_recursive

commit dd62245e73de9138333cb0e7a42c8bc1215c3ce6 upstream.

The call to debugfs_remove_recursive(qp->debugfs_dir) of the sub-level
directory must not be later than
debugfs_remove_recursive(nt_debugfs_dir) of the top-level directory.
Otherwise, the sub-level directory will not exist, and it would be
invalid (panic) to attempt to remove it.  This removes the top-level
directory last, after sub-level directories have been cleaned up.

Signed-off-by: Allen Hubbe <Allen.Hubbe@dell.com>
Fixes: e26a5843f ("NTB: Split ntb_hw_intel and ntb_transport drivers")
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 4eb8adb34508..38e9569bb856 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -2270,9 +2270,8 @@ module_init(ntb_transport_init);
 
 static void __exit ntb_transport_exit(void)
 {
-        debugfs_remove_recursive(nt_debugfs_dir);
-
         ntb_unregister_client(&ntb_transport_client);
         bus_unregister(&ntb_transport_bus);
+        debugfs_remove_recursive(nt_debugfs_dir);
 }
 module_exit(ntb_transport_exit);