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>
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index c408c81..cc941a35 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -505,8 +505,6 @@
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 @@
}
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 ? */