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Date: Mon, 4 Jun 2012 13:35:22 +0200
From: Jiri Slaby <jslaby@...e.cz>
To: gregkh@...uxfoundation.org
Cc: alan@...ux.intel.com, linux-kernel@...r.kernel.org,
jirislaby@...il.com, Samuel Ortiz <samuel@...tiz.org>,
netdev@...r.kernel.org
Subject: [PATCH 08/24] 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@...e.cz>
Cc: Samuel Ortiz <samuel@...tiz.org>
Cc: netdev@...r.kernel.org
---
net/irda/ircomm/ircomm_tty.c | 109 ++++++++++++++++++++++--------------------
1 file changed, 56 insertions(+), 53 deletions(-)
diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 03acc07..199d9cb 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -244,6 +244,7 @@ err:
static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
struct tty_struct *tty, struct file *filp)
{
+ struct tty_port *port = &self->port;
DECLARE_WAITQUEUE(wait, current);
int retval;
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)){
/* 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__ );
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
* 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
* exit, either normal or abnormal.
*/
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",
- __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)) {
extra_count = 1;
- self->port.count--;
+ port->count--;
}
- spin_unlock_irqrestore(&self->port.lock, flags);
- self->port.blocked_open++;
+ spin_unlock_irqrestore(&port->lock, flags);
+ port->blocked_open++;
while (1) {
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;
if (tty_hung_up_p(filp) ||
- !test_bit(ASYNCB_INITIALIZED, &self->port.flags)) {
- retval = (self->port.flags & ASYNC_HUP_NOTIFY) ?
+ !test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+ retval = (port->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS;
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
* ready
*/
- if (!test_bit(ASYNCB_CLOSING, &self->port.flags) &&
+ if (!test_bit(ASYNCB_CLOSING, &port->flags) &&
(do_clocal || (self->settings.dce & IRCOMM_CD)) &&
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",
- __FILE__, __LINE__, tty->driver->name, self->port.count);
+ __FILE__, __LINE__, tty->driver->name, port->count);
schedule();
}
__set_current_state(TASK_RUNNING);
- remove_wait_queue(&self->port.open_wait, &wait);
+ remove_wait_queue(&port->open_wait, &wait);
if (extra_count) {
/* ++ is not atomic, so this should be protected - Jean II */
- spin_lock_irqsave(&self->port.lock, flags);
- self->port.count++;
- spin_unlock_irqrestore(&self->port.lock, flags);
+ spin_lock_irqsave(&port->lock, flags);
+ port->count++;
+ 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",
- __FILE__, __LINE__, tty->driver->name, self->port.count);
+ __FILE__, __LINE__, tty->driver->name, port->count);
if (!retval)
- self->port.flags |= ASYNC_NORMAL_ACTIVE;
+ port->flags |= ASYNC_NORMAL_ACTIVE;
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)
{
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
+ struct tty_port *port = &self->port;
unsigned long flags;
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->magic == IRCOMM_TTY_MAGIC, return;);
- spin_lock_irqsave(&self->port.lock, flags);
+ spin_lock_irqsave(&port->lock, flags);
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__ );
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
* 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; "
"tty->count is 1, state->count is %d\n", __func__ ,
- self->port.count);
- self->port.count = 1;
+ port->count);
+ port->count = 1;
}
- if (--self->port.count < 0) {
+ if (--port->count < 0) {
IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n",
- __func__, self->line, self->port.count);
- self->port.count = 0;
+ __func__, self->line, port->count);
+ port->count = 0;
}
- if (self->port.count) {
- spin_unlock_irqrestore(&self->port.lock, flags);
+ if (port->count) {
+ spin_unlock_irqrestore(&port->lock, flags);
IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ );
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
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
- if (self->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent_from_close(tty, self->port.closing_wait);
+ if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent_from_close(tty, port->closing_wait);
ircomm_tty_shutdown(self);
tty_driver_flush_buffer(tty);
tty_ldisc_flush(tty);
- spin_lock_irqsave(&self->port.lock, flags);
+ spin_lock_irqsave(&port->lock, flags);
tty->closing = 0;
- if (self->port.blocked_open) {
- if (self->port.close_delay) {
- spin_unlock_irqrestore(&self->port.lock, flags);
- schedule_timeout_interruptible(self->port.close_delay);
- spin_lock_irqsave(&self->port.lock, flags);
+ if (port->blocked_open) {
+ if (port->close_delay) {
+ spin_unlock_irqrestore(&port->lock, flags);
+ schedule_timeout_interruptible(port->close_delay);
+ 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);
- spin_unlock_irqrestore(&self->port.lock, flags);
- wake_up_interruptible(&self->port.close_wait);
- tty_port_tty_set(&self->port, NULL);
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ spin_unlock_irqrestore(&port->lock, flags);
+ wake_up_interruptible(&port->close_wait);
+ 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)
{
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
+ struct tty_port *port = &self->port;
unsigned long flags;
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_shutdown(self);
- spin_lock_irqsave(&self->port.lock, flags);
- self->port.flags &= ~ASYNC_NORMAL_ACTIVE;
- if (self->port.tty) {
- set_bit(TTY_IO_ERROR, &self->port.tty->flags);
- tty_kref_put(self->port.tty);
+ spin_lock_irqsave(&port->lock, flags);
+ port->flags &= ~ASYNC_NORMAL_ACTIVE;
+ if (port->tty) {
+ set_bit(TTY_IO_ERROR, &port->tty->flags);
+ tty_kref_put(port->tty);
}
- self->port.tty = NULL;
- self->port.count = 0;
- spin_unlock_irqrestore(&self->port.lock, flags);
+ port->tty = NULL;
+ port->count = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
- wake_up_interruptible(&self->port.open_wait);
+ wake_up_interruptible(&port->open_wait);
}
/*
--
1.7.10.3
--
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