diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/imx.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index a220f77ceab6..adf76117a733 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1212,8 +1212,14 @@ imx_console_write(struct console *co, const char *s, unsigned int count) struct imx_port_ucrs old_ucr; unsigned int ucr1; unsigned long flags; + int locked = 1; - spin_lock_irqsave(&sport->port.lock, flags); + if (sport->port.sysrq) + locked = 0; + else if (oops_in_progress) + locked = spin_trylock_irqsave(&sport->port.lock, flags); + else + spin_lock_irqsave(&sport->port.lock, flags); /* * First, save UCR1/2/3 and then disable interrupts @@ -1240,7 +1246,8 @@ imx_console_write(struct console *co, const char *s, unsigned int count) imx_port_ucrs_restore(&sport->port, &old_ucr); - spin_unlock_irqrestore(&sport->port.lock, flags); + if (locked) + spin_unlock_irqrestore(&sport->port.lock, flags); } /* |