diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-07-03 08:30:01 -0500 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-03-24 09:29:22 -0500 |
| commit | 72d722837fccc5f1cff5d98fb72521c3990243f9 (patch) | |
| tree | 35c5cb2df3ac61242ab70c8bb43efc0b1cb8fb3a /drivers | |
| parent | 441b9ef95a0afeef1e133f6838ac88d26a5adef5 (diff) | |
serial: 8250: Clean up the locking for -rt
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/8250.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index eeadf1b8e093..43f7f4692b4f 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -2846,14 +2846,10 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count) touch_nmi_watchdog(); - local_irq_save(flags); - if (up->port.sysrq) { - /* serial8250_handle_port() already took the lock */ - locked = 0; - } else if (oops_in_progress) { - locked = spin_trylock(&up->port.lock); - } else - spin_lock(&up->port.lock); + if (up->port.sysrq || oops_in_progress) + locked = spin_trylock_irqsave(&up->port.lock, flags); + else + spin_lock_irqsave(&up->port.lock, flags); /* * First save the IER then disable the interrupts @@ -2885,8 +2881,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count) check_modem_status(up); if (locked) - spin_unlock(&up->port.lock); - local_irq_restore(flags); + spin_unlock_irqrestore(&up->port.lock, flags); } static int __init serial8250_console_setup(struct console *co, char *options) |