Commit c4432c41 authored by Martin Michlmayr's avatar Martin Michlmayr Committed by Russell King

[SERIAL] ip22zilog: Fix oops on runlevel change with serial console

Incorrect uart_write_wakeup() calls cause reference to a NULL tty
pointer.  This has been fixed in the sunsab and sunzilog serial drivers
in October 2005.  Update the ip22zilog, which is based on sunzilog,
accordingly.
Signed-off-by: default avatarMartin Michlmayr <tbm@cyrius.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk
parent 7a171cdc
......@@ -420,10 +420,8 @@ static void ip22zilog_transmit_chars(struct uart_ip22zilog_port *up,
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;
......
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