From 9c0f4755bd5a117595761c95b93c29e8d9ca07b5 Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Thu, 2 Feb 2006 20:53:39 +0000 Subject: [PATCH] [SERIAL] initialize spinlock for port failed to setup console It seems serial_core intend to initialize port->lock just once for each ports. This is done in uart_set_options() for console, and in uart_add_one_port() for other ports. But there is a case the port->lock is not initialized by serial_core. If the setup function for the console was failed, it will not call uart_set_options() but the port is marked as console (uart_console(port) returns 1). It can happen if console was PCI port which can not detected at the time of register_console. This patch is to initialize port->lock for such console port. With this change, most of spin_lock_init() (some of them are labeled "Temporary fix.") in low-level serial drivers can be omitted. Signed-off-by: Atsushi Nemoto Signed-off-by: Andrew Morton Signed-off-by: Russell King --- drivers/serial/serial_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 0717abfdae06..95fb4939c675 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -2237,7 +2237,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *port) * If this port is a console, then the spinlock is already * initialised. */ - if (!uart_console(port)) + if (!(uart_console(port) && (port->cons->flags & CON_ENABLED))) spin_lock_init(&port->lock); uart_configure_port(drv, state, port);