diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/hvc/hvcs.c | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index a049ced..817f94b 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -290,12 +290,11 @@ struct hvcs_struct { int chars_in_buffer; /* - * Any variable below the kref is valid before a tty is connected and + * Any variable below is valid before a tty is connected and * stays valid after the tty is disconnected. These shouldn't be * whacked until the kobject refcount reaches zero though some entries * may be changed via sysfs initiatives. */ - struct kref kref; /* ref count & hvcs_struct lifetime */ int connected; /* is the vty-server currently connected to a vty? */ uint32_t p_unit_address; /* partner unit address */ uint32_t p_partition_ID; /* partner partition ID */ @@ -304,9 +303,6 @@ struct hvcs_struct { struct vio_dev *vdev; }; -/* Required to back map a kref to its containing object */ -#define from_kref(k) container_of(k, struct hvcs_struct, kref) - static LIST_HEAD(hvcs_structs); static DEFINE_SPINLOCK(hvcs_structs_lock); static DEFINE_MUTEX(hvcs_init_mutex); @@ -701,10 +697,9 @@ static void hvcs_return_index(int index) hvcs_index_list[index] = -1; } -/* callback when the kref ref count reaches zero */ -static void destroy_hvcs_struct(struct kref *kref) +static void hvcs_destruct_port(struct tty_port *p) { - struct hvcs_struct *hvcsd = from_kref(kref); + struct hvcs_struct *hvcsd = container_of(p, struct hvcs_struct, port); struct vio_dev *vdev; unsigned long flags; @@ -741,6 +736,10 @@ static void destroy_hvcs_struct(struct kref *kref) kfree(hvcsd); } +static const struct tty_port_operations hvcs_port_ops = { + .destruct = hvcs_destruct_port, +}; + static int hvcs_get_index(void) { int i; @@ -790,9 +789,8 @@ static int __devinit hvcs_probe( return -ENODEV; tty_port_init(&hvcsd->port); + hvcsd->port.ops = &hvcs_port_ops; spin_lock_init(&hvcsd->lock); - /* Automatically incs the refcount the first time */ - kref_init(&hvcsd->kref); hvcsd->vdev = dev; dev_set_drvdata(&dev->dev, hvcsd); @@ -860,7 +858,7 @@ static int __devexit hvcs_remove(struct vio_dev *dev) * Let the last holder of this object cause it to be removed, which * would probably be tty_hangup below. */ - kref_put(&hvcsd->kref, destroy_hvcs_struct); + tty_port_put(&hvcsd->port); /* * The hangup is a scheduled function which will auto chain call @@ -1094,7 +1092,7 @@ static struct hvcs_struct *hvcs_get_by_index(int index) list_for_each_entry(hvcsd, &hvcs_structs, next) { spin_lock_irqsave(&hvcsd->lock, flags); if (hvcsd->index == index) { - kref_get(&hvcsd->kref); + tty_port_get(&hvcsd->port); spin_unlock_irqrestore(&hvcsd->lock, flags); spin_unlock(&hvcs_structs_lock); return hvcsd; @@ -1160,7 +1158,7 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) * and will grab the spinlock and free the connection if it fails. */ if (((rc = hvcs_enable_device(hvcsd, unit_address, irq, vdev)))) { - kref_put(&hvcsd->kref, destroy_hvcs_struct); + tty_port_put(&hvcsd->port); printk(KERN_WARNING "HVCS: enable device failed.\n"); return rc; } @@ -1171,7 +1169,7 @@ fast_open: hvcsd = tty->driver_data; spin_lock_irqsave(&hvcsd->lock, flags); - kref_get(&hvcsd->kref); + tty_port_get(&hvcsd->port); hvcsd->port.count++; hvcsd->todo_mask |= HVCS_SCHED_READ; spin_unlock_irqrestore(&hvcsd->lock, flags); @@ -1186,7 +1184,7 @@ open_success: error_release: spin_unlock_irqrestore(&hvcsd->lock, flags); - kref_put(&hvcsd->kref, destroy_hvcs_struct); + tty_port_put(&hvcsd->port); printk(KERN_WARNING "HVCS: partner connect failed.\n"); return retval; @@ -1240,7 +1238,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) tty->driver_data = NULL; free_irq(irq, hvcsd); - kref_put(&hvcsd->kref, destroy_hvcs_struct); + tty_port_put(&hvcsd->port); return; } else if (hvcsd->port.count < 0) { printk(KERN_ERR "HVCS: vty-server@%X open_count: %d" @@ -1249,7 +1247,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) } spin_unlock_irqrestore(&hvcsd->lock, flags); - kref_put(&hvcsd->kref, destroy_hvcs_struct); + tty_port_put(&hvcsd->port); } static void hvcs_hangup(struct tty_struct * tty) @@ -1301,7 +1299,7 @@ static void hvcs_hangup(struct tty_struct * tty) * NOTE: If this hangup was signaled from user space then the * final put will never happen. */ - kref_put(&hvcsd->kref, destroy_hvcs_struct); + tty_port_put(&hvcsd->port); } } |