[SPARC64]: Fix oops on runlevel change with serial console.
Incorrect uart_write_wakeup() calls cause reference to a
NULL tty pointer in sunsab and sunzilog serial drivers.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
index e971156..ba9381f 100644
--- a/drivers/serial/sunsab.c
+++ b/drivers/serial/sunsab.c
@@ -274,7 +274,6 @@
if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
up->interrupt_mask1 |= SAB82532_IMR1_XPR;
writeb(up->interrupt_mask1, &up->regs->w.imr1);
- uart_write_wakeup(&up->port);
return;
}
diff --git a/drivers/serial/sunzilog.c b/drivers/serial/sunzilog.c
index d754457..7653d6c 100644
--- a/drivers/serial/sunzilog.c
+++ b/drivers/serial/sunzilog.c
@@ -517,10 +517,9 @@
if (up->port.info == NULL)
goto ack_tx_int;
xmit = &up->port.info->xmit;
- if (uart_circ_empty(xmit)) {
- uart_write_wakeup(&up->port);
+ if (uart_circ_empty(xmit))
goto ack_tx_int;
- }
+
if (uart_tx_stopped(&up->port))
goto ack_tx_int;