1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index e001ea0606ec..bbf78aaf9e01 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2235,10 +2235,17 @@ static void
 serial8250_console_write(struct console *co, const char *s, unsigned int count)
 {
         struct uart_8250_port *up = &serial8250_ports[co->index];
+        unsigned long flags;
         unsigned int ier;
+        int locked = 1;
 
         touch_nmi_watchdog();
 
+        if (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
          */
@@ -2257,6 +2264,9 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
          */
         wait_for_xmitr(up, BOTH_EMPTY);
         serial_out(up, UART_IER, ier);
+
+        if (locked)
+                spin_unlock_irqrestore(&up->port.lock, flags);
 }
 
 static int serial8250_console_setup(struct console *co, char *options)