mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-23 01:40:30 +00:00
TTY: hvsi, use tty from tty_port
Now, we switch to the refcounted model and do not need hp->lock to protect hp->tty anymore. 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:
parent
28c0447d74
commit
daea440215
@ -76,7 +76,6 @@ struct hvsi_struct {
|
||||
wait_queue_head_t stateq; /* woken when HVSI state changes */
|
||||
spinlock_t lock;
|
||||
int index;
|
||||
struct tty_struct *tty;
|
||||
uint8_t throttle_buf[128];
|
||||
uint8_t outbuf[N_OUTBUF]; /* to implement write_room and chars_in_buffer */
|
||||
/* inbuf is for packet reassembly. leave a little room for leftovers. */
|
||||
@ -492,14 +491,17 @@ static irqreturn_t hvsi_interrupt(int irq, void *arg)
|
||||
{
|
||||
struct hvsi_struct *hp = (struct hvsi_struct *)arg;
|
||||
struct hvsi_struct *handshake;
|
||||
struct tty_struct *tty;
|
||||
unsigned long flags;
|
||||
int again = 1;
|
||||
|
||||
pr_debug("%s\n", __func__);
|
||||
|
||||
tty = tty_port_tty_get(&hp->port);
|
||||
|
||||
while (again) {
|
||||
spin_lock_irqsave(&hp->lock, flags);
|
||||
again = hvsi_load_chunk(hp, hp->tty, &handshake);
|
||||
again = hvsi_load_chunk(hp, tty, &handshake);
|
||||
spin_unlock_irqrestore(&hp->lock, flags);
|
||||
|
||||
if (handshake) {
|
||||
@ -509,15 +511,16 @@ static irqreturn_t hvsi_interrupt(int irq, void *arg)
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&hp->lock, flags);
|
||||
if (hp->tty && hp->n_throttle
|
||||
&& (!test_bit(TTY_THROTTLED, &hp->tty->flags))) {
|
||||
/* we weren't hung up and we weren't throttled, so we can deliver the
|
||||
* rest now */
|
||||
hvsi_send_overflow(hp, hp->tty);
|
||||
tty_flip_buffer_push(hp->tty);
|
||||
if (tty && hp->n_throttle && !test_bit(TTY_THROTTLED, &tty->flags)) {
|
||||
/* we weren't hung up and we weren't throttled, so we can
|
||||
* deliver the rest now */
|
||||
hvsi_send_overflow(hp, tty);
|
||||
tty_flip_buffer_push(tty);
|
||||
}
|
||||
spin_unlock_irqrestore(&hp->lock, flags);
|
||||
|
||||
tty_kref_put(tty);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
@ -724,8 +727,8 @@ static int hvsi_open(struct tty_struct *tty, struct file *filp)
|
||||
if (hp->state == HVSI_FSP_DIED)
|
||||
return -EIO;
|
||||
|
||||
tty_port_tty_set(&hp->port, tty);
|
||||
spin_lock_irqsave(&hp->lock, flags);
|
||||
hp->tty = tty;
|
||||
hp->port.count++;
|
||||
atomic_set(&hp->seqno, 0);
|
||||
h_vio_signal(hp->vtermno, VIO_IRQ_ENABLE);
|
||||
@ -784,7 +787,7 @@ static void hvsi_close(struct tty_struct *tty, struct file *filp)
|
||||
spin_lock_irqsave(&hp->lock, flags);
|
||||
|
||||
if (--hp->port.count == 0) {
|
||||
hp->tty = NULL;
|
||||
tty_port_tty_set(&hp->port, NULL);
|
||||
hp->inbuf_end = hp->inbuf; /* discard remaining partial packets */
|
||||
|
||||
/* only close down connection if it is not the console */
|
||||
@ -830,12 +833,11 @@ static void hvsi_hangup(struct tty_struct *tty)
|
||||
|
||||
pr_debug("%s\n", __func__);
|
||||
|
||||
spin_lock_irqsave(&hp->lock, flags);
|
||||
tty_port_tty_set(&hp->port, NULL);
|
||||
|
||||
spin_lock_irqsave(&hp->lock, flags);
|
||||
hp->port.count = 0;
|
||||
hp->n_outbuf = 0;
|
||||
hp->tty = NULL;
|
||||
|
||||
spin_unlock_irqrestore(&hp->lock, flags);
|
||||
}
|
||||
|
||||
@ -863,6 +865,7 @@ static void hvsi_write_worker(struct work_struct *work)
|
||||
{
|
||||
struct hvsi_struct *hp =
|
||||
container_of(work, struct hvsi_struct, writer.work);
|
||||
struct tty_struct *tty;
|
||||
unsigned long flags;
|
||||
#ifdef DEBUG
|
||||
static long start_j = 0;
|
||||
@ -896,7 +899,11 @@ static void hvsi_write_worker(struct work_struct *work)
|
||||
start_j = 0;
|
||||
#endif /* DEBUG */
|
||||
wake_up_all(&hp->emptyq);
|
||||
tty_wakeup(hp->tty);
|
||||
tty = tty_port_tty_get(&hp->port);
|
||||
if (tty) {
|
||||
tty_wakeup(tty);
|
||||
tty_kref_put(tty);
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
|
Loading…
Reference in New Issue
Block a user