tty: Push the bkl down a bit in the hangup code

We know that the redirect field is handled via its own locking in all
places

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index c408c81c06a0..cc941a3504d7 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -505,8 +505,6 @@ static void do_tty_hangup(struct work_struct *work)
         if (!tty)
                 return;
 
-        /* inuse_filps is protected by the single kernel lock */
-        lock_kernel();
 
         spin_lock(&redirect_lock);
         if (redirect && redirect->private_data == tty) {
@@ -515,6 +513,8 @@ static void do_tty_hangup(struct work_struct *work)
         }
         spin_unlock(&redirect_lock);
 
+        /* inuse_filps is protected by the single kernel lock */
+        lock_kernel();
         check_tty_count(tty, "do_tty_hangup");
         file_list_lock();
         /* This breaks for file handles being sent over AF_UNIX sockets ? */