xen: add virtual network device driver

[linux-2.6-omap-h63xx.git] / drivers / serial / sunsu.c

diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index 2a63cdba32083eae3984578722ba7159fc58eb06..26d720baf88c17619577d09420b50cade271e09d 100644 (file)
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -1288,7 +1288,17 @@ static void sunsu_console_write(struct console *co, const char *s,
                                unsigned int count)
 {
        struct uart_sunsu_port *up = &sunsu_ports[co->index];
+       unsigned long flags;
        unsigned int ier;
+       int locked = 1;
+
+       local_irq_save(flags);
+       if (up->port.sysrq) {
+               locked = 0;
+       } else if (oops_in_progress) {
+               locked = spin_trylock(&up->port.lock);
+       } else
+               spin_lock(&up->port.lock);
 
        /*
         *      First save the UER then disable the interrupts
@@ -1304,6 +1314,10 @@ static void sunsu_console_write(struct console *co, const char *s,
         */
        wait_for_xmitr(up);
        serial_out(up, UART_IER, ier);
+
+       if (locked)
+               spin_unlock(&up->port.lock);
+       local_irq_restore(flags);
 }
 
 /*