diff options
Diffstat (limited to 'drivers/tty/serial/8250.c')
| -rw-r--r-- | drivers/tty/serial/8250.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index 3bf482cb7f51..0596a359d30c 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -38,6 +38,7 @@ #include <linux/nmi.h> #include <linux/mutex.h> #include <linux/slab.h> +#include <linux/kdb.h> #include <asm/io.h> #include <asm/irq.h> @@ -2855,10 +2856,14 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count) touch_nmi_watchdog(); - if (up->port.sysrq || oops_in_progress) - locked = spin_trylock_irqsave(&up->port.lock, flags); - else - spin_lock_irqsave(&up->port.lock, flags); + if (unlikely(in_kdb_printk())) { + locked = 0; + } else { + 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 |