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Subject[PATCH 45/68] TTY: simserial, define local tty_port pointer
Date
And use it to make the code more readable.

Since tport doesn't conflict with port anymore and there are not many
tport accessors left, do also s/\<tport\>/port/g.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
---
arch/ia64/hp/sim/simserial.c | 84 ++++++++++++++++++++++--------------------
1 file changed, 44 insertions(+), 40 deletions(-)

diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 120aad4..909357e 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -47,7 +47,7 @@
#define NR_PORTS 1 /* only one port for now */

struct serial_state {
- struct tty_port tport;
+ struct tty_port port;
struct circ_buf xmit;
int irq;
int x_char;
@@ -132,8 +132,9 @@ static void receive_chars(struct tty_struct *tty)
static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
{
struct serial_state *info = dev_id;
+ struct tty_struct *tty = info->port.tty;

- if (!info->tport.tty) {
+ if (!tty) {
printk(KERN_INFO "simrs_interrupt_single: info|tty=0 info=%p problem\n", info);
return IRQ_NONE;
}
@@ -141,7 +142,7 @@ static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
* pretty simple in our case, because we only get interrupts
* on inbound traffic
*/
- receive_chars(info->tport.tty);
+ receive_chars(tty);
return IRQ_HANDLED;
}

@@ -416,7 +417,7 @@ static void shutdown(struct tty_struct *tty, struct serial_state *info)
{
unsigned long flags;

- if (!(info->tport.flags & ASYNC_INITIALIZED))
+ if (!(info->port.flags & ASYNC_INITIALIZED))
return;

#ifdef SIMSERIAL_DEBUG
@@ -436,7 +437,7 @@ static void shutdown(struct tty_struct *tty, struct serial_state *info)

set_bit(TTY_IO_ERROR, &tty->flags);

- info->tport.flags &= ~ASYNC_INITIALIZED;
+ info->port.flags &= ~ASYNC_INITIALIZED;
}
local_irq_restore(flags);
}
@@ -454,6 +455,7 @@ static void shutdown(struct tty_struct *tty, struct serial_state *info)
static void rs_close(struct tty_struct *tty, struct file * filp)
{
struct serial_state *info = tty->driver_data;
+ struct tty_port *port = &info->port;
unsigned long flags;

if (!info)
@@ -468,30 +470,30 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
return;
}
#ifdef SIMSERIAL_DEBUG
- printk("rs_close ttys%d, count = %d\n", info->line, info->tport.count);
+ printk("rs_close ttys%d, count = %d\n", info->line, port->count);
#endif
- if ((tty->count == 1) && (info->tport.count != 1)) {
+ if ((tty->count == 1) && (port->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. info->tport.count should always
+ * structure will be freed. port->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk(KERN_ERR "rs_close: bad serial port count; tty->count is 1, "
- "info->tport.count is %d\n", info->tport.count);
- info->tport.count = 1;
+ "port->count is %d\n", port->count);
+ port->count = 1;
}
- if (--info->tport.count < 0) {
+ if (--port->count < 0) {
printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
- tty->index, info->tport.count);
- info->tport.count = 0;
+ tty->index, port->count);
+ port->count = 0;
}
- if (info->tport.count) {
+ if (port->count) {
local_irq_restore(flags);
return;
}
- info->tport.flags |= ASYNC_CLOSING;
+ port->flags |= ASYNC_CLOSING;
local_irq_restore(flags);

/*
@@ -501,14 +503,14 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
shutdown(tty, info);
rs_flush_buffer(tty);
tty_ldisc_flush(tty);
- info->tport.tty = NULL;
- if (info->tport.blocked_open) {
- if (info->tport.close_delay)
- schedule_timeout_interruptible(info->tport.close_delay);
- wake_up_interruptible(&info->tport.open_wait);
+ port->tty = NULL;
+ if (port->blocked_open) {
+ if (port->close_delay)
+ schedule_timeout_interruptible(port->close_delay);
+ wake_up_interruptible(&port->open_wait);
}
- info->tport.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&info->tport.close_wait);
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ wake_up_interruptible(&port->close_wait);
}

/*
@@ -525,26 +527,27 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
static void rs_hangup(struct tty_struct *tty)
{
struct serial_state *info = tty->driver_data;
+ struct tty_port *port = &info->port;

#ifdef SIMSERIAL_DEBUG
printk("rs_hangup: called\n");
#endif

rs_flush_buffer(tty);
- if (info->tport.flags & ASYNC_CLOSING)
+ if (port->flags & ASYNC_CLOSING)
return;
shutdown(tty, info);

- info->tport.count = 0;
- info->tport.flags &= ~ASYNC_NORMAL_ACTIVE;
- info->tport.tty = NULL;
- wake_up_interruptible(&info->tport.open_wait);
+ port->count = 0;
+ port->flags &= ~ASYNC_NORMAL_ACTIVE;
+ port->tty = NULL;
+ wake_up_interruptible(&port->open_wait);
}


static int startup(struct tty_struct *tty, struct serial_state *state)
{
- struct tty_port *port = &state->tport;
+ struct tty_port *port = &state->port;
unsigned long flags;
int retval=0;
unsigned long page;
@@ -622,26 +625,27 @@ errout:
static int rs_open(struct tty_struct *tty, struct file * filp)
{
struct serial_state *info = rs_table + tty->index;
- int retval;
+ struct tty_port *port = &info->port;
+ int retval;

- info->tport.count++;
- info->tport.tty = tty;
+ port->count++;
+ port->tty = tty;
tty->driver_data = info;
- tty->port = &info->tport;
+ tty->port = port;

#ifdef SIMSERIAL_DEBUG
- printk("rs_open %s, count = %d\n", tty->name, info->tport.count);
+ printk("rs_open %s, count = %d\n", tty->name, port->count);
#endif
- tty->low_latency = (info->tport.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;

/*
* If the port is the middle of closing, bail out now
*/
- if (tty_hung_up_p(filp) || (info->tport.flags & ASYNC_CLOSING)) {
- if (info->tport.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->tport.close_wait);
+ if (tty_hung_up_p(filp) || (port->flags & ASYNC_CLOSING)) {
+ if (port->flags & ASYNC_CLOSING)
+ interruptible_sleep_on(&port->close_wait);
#ifdef SERIAL_DO_RESTART
- return ((info->tport.flags & ASYNC_HUP_NOTIFY) ?
+ return ((port->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
#else
return -EAGAIN;
@@ -774,8 +778,8 @@ static int __init simrs_init(void)
* Let's have a little bit of fun !
*/
state = rs_table;
- tty_port_init(&state->tport);
- state->tport.close_delay = 0; /* XXX really 0? */
+ tty_port_init(&state->port);
+ state->port.close_delay = 0; /* XXX really 0? */

retval = hpsim_get_irq(KEYBOARD_INTR);
if (retval < 0) {
--
1.7.9.2



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