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authorPeter Hurley <peter@hurleysoftware.com>2013-03-06 07:20:54 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-03-15 14:02:32 -0700
commit20cc225bab6709408840e4400cd1a5c2b28c7a52 (patch)
tree5e722781b19e2644fe94a035e4719ed4a821842b /drivers/tty/tty_io.c
parentea648a47e83d7cda0832f96de215464e2c35b2c2 (diff)
downloadlinux-20cc225bab6709408840e4400cd1a5c2b28c7a52.tar.bz2
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>
Diffstat (limited to 'drivers/tty/tty_io.c')
-rw-r--r--drivers/tty/tty_io.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 706c23b9cb95..fb50442fd2a4 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -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