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TTY: ircomm, define local tty_port 

In some functions we use tty_port heavily. So let us have a local
pointer to that variable instead of having self->port all over the
code.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-06-04 13:35:22 +02:00 committed by Greg Kroah-Hartman
parent 62f228acb8
commit 38c58032f0
1 changed files with 56 additions and 53 deletions
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109
net/irda/ircomm/ircomm_tty.c
View File

@ -244,6 +244,7 @@ err:
static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
struct tty_struct *tty, struct file *filp) struct tty_struct *tty, struct file *filp)
{ {
struct tty_port *port = &self->port;
DECLARE_WAITQUEUE(wait, current); DECLARE_WAITQUEUE(wait, current);
int retval; int retval;
int do_clocal = 0, extra_count = 0; int do_clocal = 0, extra_count = 0;
@ -257,7 +258,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
*/ */
if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
/* nonblock mode is set or port is not enabled */ /* nonblock mode is set or port is not enabled */
self->port.flags |= ASYNC_NORMAL_ACTIVE; port->flags |= ASYNC_NORMAL_ACTIVE;
IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __func__ ); IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __func__ );
return 0; return 0;
} }
@ -269,24 +270,24 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
/* Wait for carrier detect and the line to become /* Wait for carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in * free (i.e., not in use by the callout). While we are in
* this loop, self->port.count is dropped by one, so that * this loop, port->count is dropped by one, so that
* mgsl_close() knows when to free things. We restore it upon * mgsl_close() knows when to free things. We restore it upon
* exit, either normal or abnormal. * exit, either normal or abnormal.
*/ */
retval = 0; retval = 0;
add_wait_queue(&self->port.open_wait, &wait); add_wait_queue(&port->open_wait, &wait);
IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n", IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n",
__FILE__, __LINE__, tty->driver->name, self->port.count); __FILE__, __LINE__, tty->driver->name, port->count);
spin_lock_irqsave(&self->port.lock, flags); spin_lock_irqsave(&port->lock, flags);
if (!tty_hung_up_p(filp)) { if (!tty_hung_up_p(filp)) {
extra_count = 1; extra_count = 1;
self->port.count--; port->count--;
} }
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
self->port.blocked_open++; port->blocked_open++;
while (1) { while (1) {
if (tty->termios->c_cflag & CBAUD) { if (tty->termios->c_cflag & CBAUD) {
@ -302,8 +303,8 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
current->state = TASK_INTERRUPTIBLE; current->state = TASK_INTERRUPTIBLE;
if (tty_hung_up_p(filp) || if (tty_hung_up_p(filp) ||
!test_bit(ASYNCB_INITIALIZED, &self->port.flags)) { !test_bit(ASYNCB_INITIALIZED, &port->flags)) {
retval = (self->port.flags & ASYNC_HUP_NOTIFY) ? retval = (port->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS; -EAGAIN : -ERESTARTSYS;
break; break;
} }
@ -313,7 +314,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
* specified, we cannot return before the IrCOMM link is * specified, we cannot return before the IrCOMM link is
* ready * ready
*/ */
if (!test_bit(ASYNCB_CLOSING, &self->port.flags) && if (!test_bit(ASYNCB_CLOSING, &port->flags) &&
(do_clocal || (self->settings.dce & IRCOMM_CD)) && (do_clocal || (self->settings.dce & IRCOMM_CD)) &&
self->state == IRCOMM_TTY_READY) self->state == IRCOMM_TTY_READY)
{ {
@ -326,27 +327,27 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
} }
IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n", IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n",
__FILE__, __LINE__, tty->driver->name, self->port.count); __FILE__, __LINE__, tty->driver->name, port->count);
schedule(); schedule();
} }
__set_current_state(TASK_RUNNING); __set_current_state(TASK_RUNNING);
remove_wait_queue(&self->port.open_wait, &wait); remove_wait_queue(&port->open_wait, &wait);
if (extra_count) { if (extra_count) {
/* ++ is not atomic, so this should be protected - Jean II */ /* ++ is not atomic, so this should be protected - Jean II */
spin_lock_irqsave(&self->port.lock, flags); spin_lock_irqsave(&port->lock, flags);
self->port.count++; port->count++;
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
} }
self->port.blocked_open--; port->blocked_open--;
IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n", IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n",
__FILE__, __LINE__, tty->driver->name, self->port.count); __FILE__, __LINE__, tty->driver->name, port->count);
if (!retval) if (!retval)
self->port.flags |= ASYNC_NORMAL_ACTIVE; port->flags |= ASYNC_NORMAL_ACTIVE;
return retval; return retval;
} }
@ -484,6 +485,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
{ {
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data; struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
struct tty_port *port = &self->port;
unsigned long flags; unsigned long flags;
IRDA_DEBUG(0, "%s()\n", __func__ ); IRDA_DEBUG(0, "%s()\n", __func__ );
@ -491,16 +493,16 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
spin_lock_irqsave(&self->port.lock, flags); spin_lock_irqsave(&port->lock, flags);
if (tty_hung_up_p(filp)) { if (tty_hung_up_p(filp)) {
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
IRDA_DEBUG(0, "%s(), returning 1\n", __func__ ); IRDA_DEBUG(0, "%s(), returning 1\n", __func__ );
return; return;
} }
if ((tty->count == 1) && (self->port.count != 1)) { if ((tty->count == 1) && (port->count != 1)) {
/* /*
* Uh, oh. tty->count is 1, which means that the tty * Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. state->count should always * structure will be freed. state->count should always
@ -510,55 +512,55 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
*/ */
IRDA_DEBUG(0, "%s(), bad serial port count; " IRDA_DEBUG(0, "%s(), bad serial port count; "
"tty->count is 1, state->count is %d\n", __func__ , "tty->count is 1, state->count is %d\n", __func__ ,
self->port.count); port->count);
self->port.count = 1; port->count = 1;
} }
if (--self->port.count < 0) { if (--port->count < 0) {
IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n", IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n",
__func__, self->line, self->port.count); __func__, self->line, port->count);
self->port.count = 0; port->count = 0;
} }
if (self->port.count) { if (port->count) {
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ ); IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ );
return; return;
} }
set_bit(ASYNCB_CLOSING, &self->port.flags); set_bit(ASYNCB_CLOSING, &port->flags);
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
/* /*
* Now we wait for the transmit buffer to clear; and we notify * Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters. * the line discipline to only process XON/XOFF characters.
*/ */
tty->closing = 1; tty->closing = 1;
if (self->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
tty_wait_until_sent_from_close(tty, self->port.closing_wait); tty_wait_until_sent_from_close(tty, port->closing_wait);
ircomm_tty_shutdown(self); ircomm_tty_shutdown(self);
tty_driver_flush_buffer(tty); tty_driver_flush_buffer(tty);
tty_ldisc_flush(tty); tty_ldisc_flush(tty);
spin_lock_irqsave(&self->port.lock, flags); spin_lock_irqsave(&port->lock, flags);
tty->closing = 0; tty->closing = 0;
if (self->port.blocked_open) { if (port->blocked_open) {
if (self->port.close_delay) { if (port->close_delay) {
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
schedule_timeout_interruptible(self->port.close_delay); schedule_timeout_interruptible(port->close_delay);
spin_lock_irqsave(&self->port.lock, flags); spin_lock_irqsave(&port->lock, flags);
} }
wake_up_interruptible(&self->port.open_wait); wake_up_interruptible(&port->open_wait);
} }
self->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
wake_up_interruptible(&self->port.close_wait); wake_up_interruptible(&port->close_wait);
tty_port_tty_set(&self->port, NULL); tty_port_tty_set(port, NULL);
} }
/* /*
@ -991,6 +993,7 @@ static void ircomm_tty_shutdown(struct ircomm_tty_cb *self)
static void ircomm_tty_hangup(struct tty_struct *tty) static void ircomm_tty_hangup(struct tty_struct *tty)
{ {
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data; struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
struct tty_port *port = &self->port;
unsigned long flags; unsigned long flags;
IRDA_DEBUG(0, "%s()\n", __func__ ); IRDA_DEBUG(0, "%s()\n", __func__ );
@ -1001,17 +1004,17 @@ static void ircomm_tty_hangup(struct tty_struct *tty)
/* ircomm_tty_flush_buffer(tty); */ /* ircomm_tty_flush_buffer(tty); */
ircomm_tty_shutdown(self); ircomm_tty_shutdown(self);
spin_lock_irqsave(&self->port.lock, flags); spin_lock_irqsave(&port->lock, flags);
self->port.flags &= ~ASYNC_NORMAL_ACTIVE; port->flags &= ~ASYNC_NORMAL_ACTIVE;
if (self->port.tty) { if (port->tty) {
set_bit(TTY_IO_ERROR, &self->port.tty->flags); set_bit(TTY_IO_ERROR, &port->tty->flags);
tty_kref_put(self->port.tty); tty_kref_put(port->tty);
} }
self->port.tty = NULL; port->tty = NULL;
self->port.count = 0; port->count = 0;
spin_unlock_irqrestore(&self->port.lock, flags); spin_unlock_irqrestore(&port->lock, flags);
wake_up_interruptible(&self->port.open_wait); wake_up_interruptible(&port->open_wait);
} }
/* /*