1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index a19fef2093f1..684f0e0b175e 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -516,6 +516,8 @@ static void do_tty_hangup(struct work_struct *work)
         /* inuse_filps is protected by the single kernel lock */
         lock_kernel();
         check_tty_count(tty, "do_tty_hangup");
+        unlock_kernel();
+
         file_list_lock();
         /* This breaks for file handles being sent over AF_UNIX sockets ? */
         list_for_each_entry(filp, &tty->tty_files, f_u.fu_list) {
@@ -529,6 +531,7 @@ static void do_tty_hangup(struct work_struct *work)
         }
         file_list_unlock();
 
+        lock_kernel();
         tty_ldisc_hangup(tty);
 
         read_lock(&tasklist_lock);