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tty: Fix spinlock flavor in non-atomic __tty_hangup() 

__tty_hangup() and tty_vhangup() cannot be called from atomic context,
so locks do not need to preserve the interrupt state (although,
still disable interrupts).

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Peter Hurley 2013-03-06 07:20:54 -05:00 committed by Greg Kroah-Hartman
parent ea648a47e8
commit 20cc225bab
1 changed files with 2 additions and 3 deletions
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5
drivers/tty/tty_io.c
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@ -605,7 +605,6 @@ static void __tty_hangup(struct tty_struct *tty)
struct file *filp, *f = NULL;
struct tty_file_private *priv;
int closecount = 0, n;
unsigned long flags;
int refs;
if (!tty)
@ -654,7 +653,7 @@ static void __tty_hangup(struct tty_struct *tty)
while (refs--)
tty_kref_put(tty);
spin_lock_irqsave(&tty->ctrl_lock, flags);
spin_lock_irq(&tty->ctrl_lock);
clear_bit(TTY_THROTTLED, &tty->flags);
clear_bit(TTY_PUSH, &tty->flags);
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
@ -663,7 +662,7 @@ static void __tty_hangup(struct tty_struct *tty)
tty->session = NULL;
tty->pgrp = NULL;
tty->ctrl_status = 0;
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
spin_unlock_irq(&tty->ctrl_lock);
/*
* If one of the devices matches a console pointer, we