From 1997cf044853a2d83cd0ebc307e292fa9fa819de Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 2 Apr 2012 13:54:24 +0200 Subject: [PATCH] TTY: hvcs, add tty_port And use count from there. Signed-off-by: Jiri Slaby Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 3436436fe2d7..a049ced97430 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -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; -- 2.20.1