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serial: use tty_port

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Switch the serial_core based drivers to use the new tty_port structure.
We can't quite use all of it yet because of the dynamically allocated
extras in the serial_core layer.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
2008-07-16 21:53:50 +01:00
committed by Linus Torvalds
parent 6f67048cd0
commit df4f4dd429
5 changed files with 60 additions and 58 deletions
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80
drivers/serial/serial_core.c
View File

@@ -50,7 +50,7 @@ static struct lock_class_key port_lock_key;
#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
#define uart_users(state) ((state)->count + ((state)->info ? (state)->info->blocked_open : 0))
#define uart_users(state) ((state)->count + ((state)->info ? (state)->info->port.blocked_open : 0))
#ifdef CONFIG_SERIAL_CORE_CONSOLE
#define uart_console(port) ((port)->cons && (port)->cons->index == (port)->line)
@@ -113,7 +113,7 @@ static void uart_start(struct tty_struct *tty)
static void uart_tasklet_action(unsigned long data)
{
struct uart_state *state = (struct uart_state *)data;
tty_wakeup(state->info->tty);
tty_wakeup(state->info->port.tty);
}
static inline void
@@ -135,7 +135,7 @@ 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 semaphore.
* will be serialised by the per-port mutex.
*/
static int uart_startup(struct uart_state *state, int init_hw)
{
@@ -152,7 +152,7 @@ static int uart_startup(struct uart_state *state, int init_hw)
* once we have successfully opened the port. Also set
* up the tty->alt_speed kludge
*/
set_bit(TTY_IO_ERROR, &info->tty->flags);
set_bit(TTY_IO_ERROR, &info->port.tty->flags);
if (port->type == PORT_UNKNOWN)
return 0;
@@ -162,6 +162,7 @@ static int uart_startup(struct uart_state *state, int init_hw)
* buffer.
*/
if (!info->xmit.buf) {
/* This is protected by the per port mutex */
page = get_zeroed_page(GFP_KERNEL);
if (!page)
return -ENOMEM;
@@ -182,20 +183,20 @@ static int uart_startup(struct uart_state *state, int init_hw)
* Setup the RTS and DTR signals once the
* port is open and ready to respond.
*/
if (info->tty->termios->c_cflag & CBAUD)
if (info->port.tty->termios->c_cflag & CBAUD)
uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR);
}
if (info->flags & UIF_CTS_FLOW) {
spin_lock_irq(&port->lock);
if (!(port->ops->get_mctrl(port) & TIOCM_CTS))
info->tty->hw_stopped = 1;
info->port.tty->hw_stopped = 1;
spin_unlock_irq(&port->lock);
}
info->flags |= UIF_INITIALIZED;
clear_bit(TTY_IO_ERROR, &info->tty->flags);
clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
}
if (retval && capable(CAP_SYS_ADMIN))
@@ -217,8 +218,8 @@ static void uart_shutdown(struct uart_state *state)
/*
* Set the TTY IO error marker
*/
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
if (info->port.tty)
set_bit(TTY_IO_ERROR, &info->port.tty->flags);
if (info->flags & UIF_INITIALIZED) {
info->flags &= ~UIF_INITIALIZED;
@@ -226,7 +227,7 @@ static void uart_shutdown(struct uart_state *state)
/*
* Turn off DTR and RTS early.
*/
if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
uart_clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
/*
@@ -426,7 +427,7 @@ EXPORT_SYMBOL(uart_get_divisor);
static void
uart_change_speed(struct uart_state *state, struct ktermios *old_termios)
{
struct tty_struct *tty = state->info->tty;
struct tty_struct *tty = state->info->port.tty;
struct uart_port *port = state->port;
struct ktermios *termios;
@@ -836,8 +837,8 @@ static int uart_set_info(struct uart_state *state,
state->closing_wait = closing_wait;
if (new_serial.xmit_fifo_size)
port->fifosize = new_serial.xmit_fifo_size;
if (state->info->tty)
state->info->tty->low_latency =
if (state->info->port.tty)
state->info->port.tty->low_latency =
(port->flags & UPF_LOW_LATENCY) ? 1 : 0;
check_and_exit:
@@ -857,7 +858,7 @@ static int uart_set_info(struct uart_state *state,
printk(KERN_NOTICE
"%s sets custom speed on %s. This "
"is deprecated.\n", current->comm,
tty_name(state->info->tty, buf));
tty_name(state->info->port.tty, buf));
}
uart_change_speed(state, NULL);
}
@@ -889,7 +890,7 @@ static int uart_get_lsr_info(struct uart_state *state,
*/
if (port->x_char ||
((uart_circ_chars_pending(&state->info->xmit) > 0) &&
!state->info->tty->stopped && !state->info->tty->hw_stopped))
!state->info->port.tty->stopped && !state->info->port.tty->hw_stopped))
result &= ~TIOCSER_TEMT;
return put_user(result, value);
@@ -1239,7 +1240,7 @@ static void uart_set_termios(struct tty_struct *tty,
*/
if (!(old_termios->c_cflag & CLOCAL) &&
(tty->termios->c_cflag & CLOCAL))
wake_up_interruptible(&state->info->open_wait);
wake_up_interruptible(&state->info->port.open_wait);
#endif
}
@@ -1320,9 +1321,9 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
tty_ldisc_flush(tty);
tty->closing = 0;
state->info->tty = NULL;
state->info->port.tty = NULL;
if (state->info->blocked_open) {
if (state->info->port.blocked_open) {
if (state->close_delay)
msleep_interruptible(state->close_delay);
} else if (!uart_console(port)) {
@@ -1333,7 +1334,7 @@ static void uart_close(struct tty_struct *tty, struct file *filp)
* Wake up anyone trying to open this port.
*/
state->info->flags &= ~UIF_NORMAL_ACTIVE;
wake_up_interruptible(&state->info->open_wait);
wake_up_interruptible(&state->info->port.open_wait);
done:
mutex_unlock(&state->mutex);
@@ -1417,8 +1418,8 @@ static void uart_hangup(struct tty_struct *tty)
uart_shutdown(state);
state->count = 0;
state->info->flags &= ~UIF_NORMAL_ACTIVE;
state->info->tty = NULL;
wake_up_interruptible(&state->info->open_wait);
state->info->port.tty = NULL;
wake_up_interruptible(&state->info->port.open_wait);
wake_up_interruptible(&state->info->delta_msr_wait);
}
mutex_unlock(&state->mutex);
@@ -1432,7 +1433,7 @@ static void uart_hangup(struct tty_struct *tty)
*/
static void uart_update_termios(struct uart_state *state)
{
struct tty_struct *tty = state->info->tty;
struct tty_struct *tty = state->info->port.tty;
struct uart_port *port = state->port;
if (uart_console(port) && port->cons->cflag) {
@@ -1471,17 +1472,17 @@ uart_block_til_ready(struct file *filp, struct uart_state *state)
struct uart_port *port = state->port;
unsigned int mctrl;
info->blocked_open++;
info->port.blocked_open++;
state->count--;
add_wait_queue(&info->open_wait, &wait);
add_wait_queue(&info->port.open_wait, &wait);
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
/*
* If we have been hung up, tell userspace/restart open.
*/
if (tty_hung_up_p(filp) || info->tty == NULL)
if (tty_hung_up_p(filp) || info->port.tty == NULL)
break;
/*
@@ -1500,8 +1501,8 @@ uart_block_til_ready(struct file *filp, struct uart_state *state)
* have set TTY_IO_ERROR for a non-existant port.
*/
if ((filp->f_flags & O_NONBLOCK) ||
(info->tty->termios->c_cflag & CLOCAL) ||
(info->tty->flags & (1 << TTY_IO_ERROR)))
(info->port.tty->termios->c_cflag & CLOCAL) ||
(info->port.tty->flags & (1 << TTY_IO_ERROR)))
break;
/*
@@ -1509,7 +1510,7 @@ uart_block_til_ready(struct file *filp, struct uart_state *state)
* not set RTS here - we want to make sure we catch
* the data from the modem.
*/
if (info->tty->termios->c_cflag & CBAUD)
if (info->port.tty->termios->c_cflag & CBAUD)
uart_set_mctrl(port, TIOCM_DTR);
/*
@@ -1531,15 +1532,15 @@ uart_block_til_ready(struct file *filp, struct uart_state *state)
break;
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&info->open_wait, &wait);
remove_wait_queue(&info->port.open_wait, &wait);
state->count++;
info->blocked_open--;
info->port.blocked_open--;
if (signal_pending(current))
return -ERESTARTSYS;
if (!info->tty || tty_hung_up_p(filp))
if (!info->port.tty || tty_hung_up_p(filp))
return -EAGAIN;
return 0;
@@ -1562,10 +1563,13 @@ static struct uart_state *uart_get(struct uart_driver *drv, int line)
goto err_unlock;
}
/* BKL: RACE HERE - LEAK */
/* We should move this into the uart_state structure and kill off
this whole complexity */
if (!state->info) {
state->info = kzalloc(sizeof(struct uart_info), GFP_KERNEL);
if (state->info) {
init_waitqueue_head(&state->info->open_wait);
init_waitqueue_head(&state->info->port.open_wait);
init_waitqueue_head(&state->info->delta_msr_wait);
/*
@@ -1622,7 +1626,7 @@ static int uart_open(struct tty_struct *tty, struct file *filp)
* be re-entered while allocating the info structure, or while we
* request any IRQs that the driver may need. This also has the nice
* side-effect that it delays the action of uart_hangup, so we can
* guarantee that info->tty will always contain something reasonable.
* guarantee that info->port.tty will always contain something reasonable.
*/
state = uart_get(drv, line);
if (IS_ERR(state)) {
@@ -1638,7 +1642,7 @@ static int uart_open(struct tty_struct *tty, struct file *filp)
tty->driver_data = state;
tty->low_latency = (state->port->flags & UPF_LOW_LATENCY) ? 1 : 0;
tty->alt_speed = 0;
state->info->tty = tty;
state->info->port.tty = tty;
/*
* If the port is in the middle of closing, bail out now.
@@ -2101,8 +2105,8 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *port)
/*
* If that's unset, use the tty termios setting.
*/
if (state->info && state->info->tty && termios.c_cflag == 0)
termios = *state->info->tty->termios;
if (state->info && state->info->port.tty && termios.c_cflag == 0)
termios = *state->info->port.tty->termios;
uart_change_pm(state, 0);
port->ops->set_termios(port, &termios, NULL);
@@ -2521,8 +2525,8 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *port)
tty_unregister_device(drv->tty_driver, port->line);
info = state->info;
if (info && info->tty)
tty_vhangup(info->tty);
if (info && info->port.tty)
tty_vhangup(info->port.tty);
/*
* All users of this port should now be disconnected from