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TTY: hvcs, add tty_port 

And use count from there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-04-02 13:54:24 +02:00 committed by Greg Kroah-Hartman
parent 0146b69390
commit 1997cf0448
1 changed files with 12 additions and 12 deletions
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24
drivers/tty/hvc/hvcs.c
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@ -261,6 +261,7 @@ static DEFINE_SPINLOCK(hvcs_pi_lock);
/* One vty-server per hvcs_struct */
struct hvcs_struct {
struct tty_port port;
spinlock_t lock;
/*
@ -270,7 +271,6 @@ struct hvcs_struct {
unsigned int index;
struct tty_struct *tty;
int open_count;
/*
* Used to tell the driver kernel_thread what operations need to take
@ -422,7 +422,7 @@ static ssize_t hvcs_vterm_state_store(struct device *dev, struct device_attribut
spin_lock_irqsave(&hvcsd->lock, flags);
if (hvcsd->open_count > 0) {
if (hvcsd->port.count > 0) {
spin_unlock_irqrestore(&hvcsd->lock, flags);
printk(KERN_INFO "HVCS: vterm state unchanged. "
"The hvcs device node is still in use.\n");
@ -789,7 +789,7 @@ static int __devinit hvcs_probe(
if (!hvcsd)
return -ENODEV;
tty_port_init(&hvcsd->port);
spin_lock_init(&hvcsd->lock);
/* Automatically incs the refcount the first time */
kref_init(&hvcsd->kref);
@ -1138,7 +1138,7 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp)
if ((retval = hvcs_partner_connect(hvcsd)))
goto error_release;
hvcsd->open_count = 1;
hvcsd->port.count = 1;
hvcsd->tty = tty;
tty->driver_data = hvcsd;
@ -1172,7 +1172,7 @@ fast_open:
spin_lock_irqsave(&hvcsd->lock, flags);
kref_get(&hvcsd->kref);
hvcsd->open_count++;
hvcsd->port.count++;
hvcsd->todo_mask |= HVCS_SCHED_READ;
spin_unlock_irqrestore(&hvcsd->lock, flags);
@ -1216,7 +1216,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
hvcsd = tty->driver_data;
spin_lock_irqsave(&hvcsd->lock, flags);
if (--hvcsd->open_count == 0) {
if (--hvcsd->port.count == 0) {
vio_disable_interrupts(hvcsd->vdev);
@ -1242,10 +1242,10 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
free_irq(irq, hvcsd);
kref_put(&hvcsd->kref, destroy_hvcs_struct);
return;
} else if (hvcsd->open_count < 0) {
} else if (hvcsd->port.count < 0) {
printk(KERN_ERR "HVCS: vty-server@%X open_count: %d"
" is missmanaged.\n",
hvcsd->vdev->unit_address, hvcsd->open_count);
hvcsd->vdev->unit_address, hvcsd->port.count);
}
spin_unlock_irqrestore(&hvcsd->lock, flags);
@ -1261,7 +1261,7 @@ static void hvcs_hangup(struct tty_struct * tty)
spin_lock_irqsave(&hvcsd->lock, flags);
/* Preserve this so that we know how many kref refs to put */
temp_open_count = hvcsd->open_count;
temp_open_count = hvcsd->port.count;
/*
* Don't kref put inside the spinlock because the destruction
@ -1276,7 +1276,7 @@ static void hvcs_hangup(struct tty_struct * tty)
hvcsd->tty->driver_data = NULL;
hvcsd->tty = NULL;
hvcsd->open_count = 0;
hvcsd->port.count = 0;
/* This will drop any buffered data on the floor which is OK in a hangup
* scenario. */
@ -1347,7 +1347,7 @@ static int hvcs_write(struct tty_struct *tty,
* the middle of a write operation? This is a crummy place to do this
* but we want to keep it all in the spinlock.
*/
if (hvcsd->open_count <= 0) {
if (hvcsd->port.count <= 0) {
spin_unlock_irqrestore(&hvcsd->lock, flags);
return -ENODEV;
}
@ -1421,7 +1421,7 @@ static int hvcs_write_room(struct tty_struct *tty)
{
struct hvcs_struct *hvcsd = tty->driver_data;
if (!hvcsd || hvcsd->open_count <= 0)
if (!hvcsd || hvcsd->port.count <= 0)
return 0;
return HVCS_BUFF_LEN - hvcsd->chars_in_buffer;