serial: use tty_port
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>
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index ac4f20c..ce948b6 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -1287,7 +1287,7 @@
static void
receive_chars(struct uart_8250_port *up, unsigned int *status)
{
- struct tty_struct *tty = up->port.info->tty;
+ struct tty_struct *tty = up->port.info->port.tty;
unsigned char ch, lsr = *status;
int max_count = 256;
char flag;
diff --git a/drivers/serial/jsm/jsm_neo.c b/drivers/serial/jsm/jsm_neo.c
index b2d6f5b..b7584ca 100644
--- a/drivers/serial/jsm/jsm_neo.c
+++ b/drivers/serial/jsm/jsm_neo.c
@@ -998,7 +998,7 @@
{ 50, B50 },
};
- cflag = C_BAUD(ch->uart_port.info->tty);
+ cflag = C_BAUD(ch->uart_port.info->port.tty);
baud = 9600;
for (i = 0; i < ARRAY_SIZE(baud_rates); i++) {
if (baud_rates[i].cflag == cflag) {
diff --git a/drivers/serial/jsm/jsm_tty.c b/drivers/serial/jsm/jsm_tty.c
index 94ec663..a697914 100644
--- a/drivers/serial/jsm/jsm_tty.c
+++ b/drivers/serial/jsm/jsm_tty.c
@@ -145,7 +145,7 @@
struct ktermios *termios;
spin_lock_irqsave(&port->lock, lock_flags);
- termios = port->info->tty->termios;
+ termios = port->info->port.tty->termios;
if (ch == termios->c_cc[VSTART])
channel->ch_bd->bd_ops->send_start_character(channel);
@@ -239,7 +239,7 @@
channel->ch_cached_lsr = 0;
channel->ch_stops_sent = 0;
- termios = port->info->tty->termios;
+ termios = port->info->port.tty->termios;
channel->ch_c_cflag = termios->c_cflag;
channel->ch_c_iflag = termios->c_iflag;
channel->ch_c_oflag = termios->c_oflag;
@@ -272,7 +272,7 @@
jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "start\n");
bd = channel->ch_bd;
- ts = channel->uart_port.info->tty->termios;
+ ts = channel->uart_port.info->port.tty->termios;
channel->ch_flags &= ~(CH_STOPI);
@@ -515,7 +515,7 @@
if (!ch)
return;
- tp = ch->uart_port.info->tty;
+ tp = ch->uart_port.info->port.tty;
bd = ch->ch_bd;
if(!bd)
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 9884bc9..0bce1fe 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -50,7 +50,7 @@
#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_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 @@
/*
* 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 @@
* 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 @@
* 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 @@
* 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 @@
/*
* 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 @@
/*
* 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 @@
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 @@
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 @@
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 @@
*/
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 @@
*/
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 @@
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 @@
* 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 @@
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_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 @@
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 @@
* 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 @@
* 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 @@
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 @@
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 @@
* 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 @@
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 @@
/*
* 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 @@
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