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

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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: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk
This commit is contained in:
Martin Michlmayr 2006-03-07 21:04:59 +00:00 committed by Russell King
parent 7a171cdcb6
commit c4432c41b0
1 changed files with 1 additions and 3 deletions
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4
drivers/serial/ip22zilog.c
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@ -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;