pty: Use spin_lock_irq() for pty_set_termios()

The tty driver's set_termios() method is called with interrupts
enabled; there is no need to save and restore the local interrupt state.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 7f612c524224..394374789292 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -259,8 +259,6 @@ out:
 static void pty_set_termios(struct tty_struct *tty,
                                         struct ktermios *old_termios)
 {
-        unsigned long flags;
-
         /* See if packet mode change of state. */
         if (tty->link && tty->link->packet) {
                 int extproc = (old_termios->c_lflag & EXTPROC) |
@@ -272,7 +270,7 @@ static void pty_set_termios(struct tty_struct *tty,
                                 STOP_CHAR(tty) == '\023' &&
                                 START_CHAR(tty) == '\021');
                 if ((old_flow != new_flow) || extproc) {
-                        spin_lock_irqsave(&tty->ctrl_lock, flags);
+                        spin_lock_irq(&tty->ctrl_lock);
                         if (old_flow != new_flow) {
                                 tty->ctrl_status &= ~(TIOCPKT_DOSTOP | TIOCPKT_NOSTOP);
                                 if (new_flow)
@@ -282,7 +280,7 @@ static void pty_set_termios(struct tty_struct *tty,
                         }
                         if (extproc)
                                 tty->ctrl_status |= TIOCPKT_IOCTL;
-                        spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+                        spin_unlock_irq(&tty->ctrl_lock);
                         wake_up_interruptible(&tty->link->read_wait);
                 }
         }