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TTY: HVC, use tty from tty_port 

The driver already used refcounting. So we just switch it to tty_port
helpers. And switch to tty_port->lock for tty.

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 13:54:22 +02:00 committed by Greg Kroah-Hartman
parent f3d9f25097
commit 85bbc003b2
3 changed files with 16 additions and 23 deletions
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36
drivers/tty/hvc/hvc_console.c
View File

@ -323,11 +323,10 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
} /* else count == 0 */
tty->driver_data = hp;
hp->tty = tty_kref_get(tty);
spin_unlock_irqrestore(&hp->lock, flags);
tty_port_tty_set(&hp->port, tty);
if (hp->ops->notifier_add)
rc = hp->ops->notifier_add(hp, hp->data);
@ -338,9 +337,7 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
* tty fields and return the kref reference.
*/
if (rc) {
spin_lock_irqsave(&hp->lock, flags);
hp->tty = NULL;
spin_unlock_irqrestore(&hp->lock, flags);
tty_port_tty_set(&hp->port, NULL);
tty_kref_put(tty);
tty->driver_data = NULL;
tty_port_put(&hp->port);
@ -373,9 +370,9 @@ static void hvc_close(struct tty_struct *tty, struct file * filp)
spin_lock_irqsave(&hp->lock, flags);
if (--hp->count == 0) {
/* We are done with the tty pointer now. */
hp->tty = NULL;
spin_unlock_irqrestore(&hp->lock, flags);
/* We are done with the tty pointer now. */
tty_port_tty_set(&hp->port, NULL);
if (hp->ops->notifier_del)
hp->ops->notifier_del(hp, hp->data);
@ -427,9 +424,8 @@ static void hvc_hangup(struct tty_struct *tty)
temp_open_count = hp->count;
hp->count = 0;
hp->n_outbuf = 0;
hp->tty = NULL;
spin_unlock_irqrestore(&hp->lock, flags);
tty_port_tty_set(&hp->port, NULL);
if (hp->ops->notifier_hangup)
hp->ops->notifier_hangup(hp, hp->data);
@ -526,13 +522,12 @@ static void hvc_set_winsz(struct work_struct *work)
hp = container_of(work, struct hvc_struct, tty_resize);
spin_lock_irqsave(&hp->lock, hvc_flags);
if (!hp->tty) {
spin_unlock_irqrestore(&hp->lock, hvc_flags);
tty = tty_port_tty_get(&hp->port);
if (!tty)
return;
}
ws = hp->ws;
tty = tty_kref_get(hp->tty);
spin_lock_irqsave(&hp->lock, hvc_flags);
ws = hp->ws;
spin_unlock_irqrestore(&hp->lock, hvc_flags);
tty_do_resize(tty, &ws);
@ -601,7 +596,7 @@ int hvc_poll(struct hvc_struct *hp)
}
/* No tty attached, just skip */
tty = tty_kref_get(hp->tty);
tty = tty_port_tty_get(&hp->port);
if (tty == NULL)
goto bail;
@ -681,8 +676,7 @@ int hvc_poll(struct hvc_struct *hp)
tty_flip_buffer_push(tty);
}
if (tty)
tty_kref_put(tty);
tty_kref_put(tty);
return poll_mask;
}
@ -880,9 +874,9 @@ int hvc_remove(struct hvc_struct *hp)
unsigned long flags;
struct tty_struct *tty;
spin_lock_irqsave(&hp->lock, flags);
tty = tty_kref_get(hp->tty);
tty = tty_port_tty_get(&hp->port);
spin_lock_irqsave(&hp->lock, flags);
if (hp->index < MAX_NR_HVC_CONSOLES)
vtermnos[hp->index] = -1;

1
drivers/tty/hvc/hvc_console.h
View File

@ -49,7 +49,6 @@ struct hvc_struct {
struct tty_port port;
spinlock_t lock;
int index;
struct tty_struct *tty;
int count;
int do_wakeup;
char *outbuf;

2
drivers/tty/hvc/hvsi_lib.c
View File

@ -377,7 +377,7 @@ int hvsilib_open(struct hvsi_priv *pv, struct hvc_struct *hp)
pr_devel("HVSI@%x: open !\n", pv->termno);
/* Keep track of the tty data structure */
pv->tty = tty_kref_get(hp->tty);
pv->tty = tty_port_tty_get(&hp->port);
hvsilib_establish(pv);