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Date: Thu, 7 Mar 2013 13:12:40 +0100
From: Jiri Slaby <jslaby@...e.cz>
To: gregkh@...uxfoundation.org
Cc: peter@...leysoftware.com, jirislaby@...il.com,
linux-kernel@...r.kernel.org
Subject: [PATCH 16/16] crisv10: use counts from tty_port
The same as flags, convert to using open/close counts from tty_port.
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
drivers/tty/serial/crisv10.c | 48 +++++++++++++++++++++-----------------------
drivers/tty/serial/crisv10.h | 2 --
2 files changed, 23 insertions(+), 27 deletions(-)
diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c
index ef5bca1..477f22f 100644
--- a/drivers/tty/serial/crisv10.c
+++ b/drivers/tty/serial/crisv10.c
@@ -3424,7 +3424,7 @@ set_serial_info(struct e100_serial *info,
goto check_and_exit;
}
- if (info->count > 1)
+ if (info->port.count > 1)
return -EBUSY;
/*
@@ -3760,7 +3760,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
printk("[%d] rs_close ttyS%d, count = %d\n", current->pid,
info->line, info->count);
#endif
- if ((tty->count == 1) && (info->count != 1)) {
+ if ((tty->count == 1) && (info->port.count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
@@ -3770,15 +3770,15 @@ rs_close(struct tty_struct *tty, struct file * filp)
*/
printk(KERN_ERR
"rs_close: bad serial port count; tty->count is 1, "
- "info->count is %d\n", info->count);
- info->count = 1;
+ "info->count is %d\n", info->port.count);
+ info->port.count = 1;
}
- if (--info->count < 0) {
+ if (--info->port.count < 0) {
printk(KERN_ERR "rs_close: bad serial port count for ttyS%d: %d\n",
- info->line, info->count);
- info->count = 0;
+ info->line, info->port.count);
+ info->port.count = 0;
}
- if (info->count) {
+ if (info->port.count) {
local_irq_restore(flags);
return;
}
@@ -3824,7 +3824,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
tty->closing = 0;
info->event = 0;
info->port.tty = NULL;
- if (info->blocked_open) {
+ if (info->port.blocked_open) {
if (info->port.close_delay)
schedule_timeout_interruptible(info->port.close_delay);
wake_up_interruptible(&info->port.open_wait);
@@ -3923,7 +3923,7 @@ rs_hangup(struct tty_struct *tty)
rs_flush_buffer(tty);
shutdown(info);
info->event = 0;
- info->count = 0;
+ info->port.count = 0;
info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
info->port.tty = NULL;
wake_up_interruptible(&info->port.open_wait);
@@ -3978,7 +3978,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
/*
* Block waiting for the carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
+ * this loop, info->port.count is dropped by one, so that
* rs_close() knows when to free things. We restore it upon
* exit, either normal or abnormal.
*/
@@ -3986,15 +3986,15 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
add_wait_queue(&info->port.open_wait, &wait);
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready before block: ttyS%d, count = %d\n",
- info->line, info->count);
+ info->line, info->port.count);
#endif
local_irq_save(flags);
if (!tty_hung_up_p(filp)) {
extra_count++;
- info->count--;
+ info->port.count--;
}
local_irq_restore(flags);
- info->blocked_open++;
+ info->port.blocked_open++;
while (1) {
local_irq_save(flags);
/* assert RTS and DTR */
@@ -4023,7 +4023,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
}
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready blocking: ttyS%d, count = %d\n",
- info->line, info->count);
+ info->line, info->port.count);
#endif
tty_unlock(tty);
schedule();
@@ -4032,11 +4032,11 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
set_current_state(TASK_RUNNING);
remove_wait_queue(&info->port.open_wait, &wait);
if (extra_count)
- info->count++;
- info->blocked_open--;
+ info->port.count++;
+ info->port.blocked_open--;
#ifdef SERIAL_DEBUG_OPEN
printk("block_til_ready after blocking: ttyS%d, count = %d\n",
- info->line, info->count);
+ info->line, info->port.count);
#endif
if (retval)
return retval;
@@ -4074,10 +4074,10 @@ rs_open(struct tty_struct *tty, struct file * filp)
#ifdef SERIAL_DEBUG_OPEN
printk("[%d] rs_open %s, count = %d\n", current->pid, tty->name,
- info->count);
+ info->port.count);
#endif
- info->count++;
+ info->port.count++;
tty->driver_data = info;
info->port.tty = tty;
@@ -4101,7 +4101,7 @@ rs_open(struct tty_struct *tty, struct file * filp)
/*
* If DMA is enabled try to allocate the irq's.
*/
- if (info->count == 1) {
+ if (info->port.count == 1) {
allocated_resources = 1;
if (info->dma_in_enabled) {
if (request_irq(info->dma_in_irq_nbr,
@@ -4174,7 +4174,7 @@ rs_open(struct tty_struct *tty, struct file * filp)
if (allocated_resources)
deinit_port(info);
- /* FIXME Decrease count info->count here too? */
+ /* FIXME Decrease count info->port.count here too? */
return retval;
}
@@ -4191,7 +4191,7 @@ rs_open(struct tty_struct *tty, struct file * filp)
return retval;
}
- if ((info->count == 1) && (info->port.flags & ASYNC_SPLIT_TERMIOS)) {
+ if ((info->port.count == 1) && (info->port.flags & ASYNC_SPLIT_TERMIOS)) {
tty->termios = info->normal_termios;
change_speed(info);
}
@@ -4442,8 +4442,6 @@ static int __init rs_init(void)
info->custom_divisor = 0;
info->x_char = 0;
info->event = 0;
- info->count = 0;
- info->blocked_open = 0;
info->normal_termios = driver->init_termios;
info->xmit.buf = NULL;
info->xmit.tail = info->xmit.head = 0;
diff --git a/drivers/tty/serial/crisv10.h b/drivers/tty/serial/crisv10.h
index 1cd2299..7599014 100644
--- a/drivers/tty/serial/crisv10.h
+++ b/drivers/tty/serial/crisv10.h
@@ -90,8 +90,6 @@ struct e100_serial {
unsigned long event;
int line;
int type; /* PORT_ETRAX */
- int count; /* # of fd on device */
- int blocked_open; /* # of blocked opens */
struct circ_buf xmit;
struct etrax_recv_buffer *first_recv_buffer;
struct etrax_recv_buffer *last_recv_buffer;
--
1.8.1.4
--
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