Commit c0d92be6 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman
Browse files

TTY: serial, extract uart_port_startup 



Extract ASYNC_INITIALIZED/TTY_IO_ERROR handling from uart_startup.
This will be useful for tty port helpers. These flags are handled
by the helpers instead.

So we create a new function uart_port_startup without touching these
flags there. And we keep uart_startup with the exact behavior as
before. We need that one because we start/stop the device from other
paths than open/close/hangup.

Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent b922e19d

drivers/tty/serial/serial_core.c

+28 −15
Original line number Diff line number Diff line
@@ -131,24 +131,16 @@ uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear) 
 * Startup the port.  This will be called once per open.  All calls

 * will be serialised by the per-port mutex.

 */

static int uart_startup(struct tty_struct *tty, struct uart_state *state, int init_hw)

static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,

		int init_hw)

{

	struct uart_port *uport = state->uart_port;

	struct tty_port *port = &state->port;

	unsigned long page;

	int retval = 0;



	if (port->flags & ASYNC_INITIALIZED)

		return 0;



	/*

	 * Set the TTY IO error marker - we will only clear this

	 * once we have successfully opened the port.

	 */

	set_bit(TTY_IO_ERROR, &tty->flags);



	if (uport->type == PORT_UNKNOWN)

		return 0;

		return 1;



	/*

	 * Initialise and allocate the transmit and temporary
@@ -190,10 +182,6 @@ static int uart_startup(struct tty_struct *tty, struct uart_state *state, int in 
				tty->hw_stopped = 1;

			spin_unlock_irq(&uport->lock);

		}



		set_bit(ASYNCB_INITIALIZED, &port->flags);



		clear_bit(TTY_IO_ERROR, &tty->flags);

	}



	/*
@@ -202,6 +190,31 @@ static int uart_startup(struct tty_struct *tty, struct uart_state *state, int in 
	 * now.

	 */

	if (retval && capable(CAP_SYS_ADMIN))

		return 1;



	return retval;

}



static int uart_startup(struct tty_struct *tty, struct uart_state *state,

		int init_hw)

{

	struct tty_port *port = &state->port;

	int retval;



	if (port->flags & ASYNC_INITIALIZED)

		return 0;



	/*

	 * Set the TTY IO error marker - we will only clear this

	 * once we have successfully opened the port.

	 */

	set_bit(TTY_IO_ERROR, &tty->flags);



	retval = uart_port_startup(tty, state, init_hw);

	if (!retval) {

		set_bit(ASYNCB_INITIALIZED, &port->flags);

		clear_bit(TTY_IO_ERROR, &tty->flags);

	} else if (retval > 0)

		retval = 0;



	return retval;

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