From: Peter Hurley <peter@hurleysoftware.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
Peter Hurley <peter@hurleysoftware.com>
Subject: [PATCH -next 3/9] pty: Use spin_lock_irq() for pty_set_termios()
Date: Thu, 16 Oct 2014 15:33:24 -0400 [thread overview]
Message-ID: <1413488010-16885-4-git-send-email-peter@hurleysoftware.com> (raw)
In-Reply-To: <1413488010-16885-1-git-send-email-peter@hurleysoftware.com>
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>
---
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 7f612c5..3943747 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);
}
}
--
2.1.1
next prev parent reply other threads:[~2014-10-16 19:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-16 19:33 [PATCH -next 0/9] pty fixes Peter Hurley
2014-10-16 19:33 ` [PATCH -next 1/9] tty: WARN for attempted set_termios() of pty master Peter Hurley
2014-10-16 19:33 ` [PATCH -next 2/9] tty: Move pty-specific set_termios() handling to pty driver Peter Hurley
2014-10-16 19:33 ` Peter Hurley [this message]
2014-10-16 19:33 ` [PATCH -next 4/9] tty: Use spin_lock_irq() for ctrl_lock when interrupts enabled Peter Hurley
2014-10-16 19:33 ` [PATCH -next 5/9] pty: Don't claim slave's ctrl_lock for master's packet mode Peter Hurley
2014-10-16 19:33 ` [PATCH -next 6/9] pty: Fix packet mode setting race Peter Hurley
2014-10-16 19:33 ` [PATCH -next 7/9] pty: Hold ctrl_lock for packet mode updates Peter Hurley
2014-10-16 19:33 ` [PATCH -next 8/9] tty: Fix missed wakeup from packet mode status update Peter Hurley
2014-10-16 19:33 ` [PATCH -next 9/9] n_tty: Only process packet mode data in raw mode Peter Hurley
2014-10-22 15:37 ` [PATCH -next 0/9] pty fixes One Thousand Gnomes
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