From 4d8c1dff6a8666a2e18a7d5954c2156be0d5b152 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Thu, 16 Oct 2014 15:33:24 -0400 Subject: [PATCH] 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 Reviewed-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 6 ++---- 1 file 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); } } -- 2.30.2