diff options
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/char/con3215.c | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index f7bc23baf54..e928e040800 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -83,7 +83,6 @@ struct raw3215_info { int head; /* first free byte in output buffer */ int count; /* number of bytes in output buffer */ int written; /* number of bytes in write requests */ - struct tty_struct *tty; /* pointer to tty structure if present */ struct raw3215_req *queued_read; /* pointer to queued read requests */ struct raw3215_req *queued_write;/* pointer to queued write requests */ struct tasklet_struct tlet; /* tasklet to invoke tty_wakeup */ @@ -343,11 +342,11 @@ static void raw3215_wakeup(unsigned long data) /* * Try to start the next IO and wake up processes waiting on the tty. */ -static void raw3215_next_io(struct raw3215_info *raw) +static void raw3215_next_io(struct raw3215_info *raw, struct tty_struct *tty) { raw3215_mk_write_req(raw); raw3215_try_io(raw); - if (raw->tty && RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) + if (tty && RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) tasklet_schedule(&raw->tlet); } @@ -365,10 +364,11 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, raw = dev_get_drvdata(&cdev->dev); req = (struct raw3215_req *) intparm; + tty = tty_port_tty_get(&raw->port); cstat = irb->scsw.cmd.cstat; dstat = irb->scsw.cmd.dstat; if (cstat != 0) - raw3215_next_io(raw); + raw3215_next_io(raw, tty); if (dstat & 0x01) { /* we got a unit exception */ dstat &= ~0x01; /* we can ignore it */ } @@ -378,13 +378,13 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, break; /* Attention interrupt, someone hit the enter key */ raw3215_mk_read_req(raw); - raw3215_next_io(raw); + raw3215_next_io(raw, tty); break; case 0x08: case 0x0C: /* Channel end interrupt. */ if ((raw = req->info) == NULL) - return; /* That shouldn't happen ... */ + goto put_tty; /* That shouldn't happen ... */ if (req->type == RAW3215_READ) { /* store residual count, then wait for device end */ req->residual = irb->scsw.cmd.count; @@ -394,11 +394,10 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, case 0x04: /* Device end interrupt. */ if ((raw = req->info) == NULL) - return; /* That shouldn't happen ... */ - if (req->type == RAW3215_READ && raw->tty != NULL) { + goto put_tty; /* That shouldn't happen ... */ + if (req->type == RAW3215_READ && tty != NULL) { unsigned int cchar; - tty = raw->tty; count = 160 - req->residual; EBCASC(raw->inbuf, count); cchar = ctrlchar_handle(raw->inbuf, count, tty); @@ -408,7 +407,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, case CTRLCHAR_CTRL: tty_insert_flip_char(tty, cchar, TTY_NORMAL); - tty_flip_buffer_push(raw->tty); + tty_flip_buffer_push(tty); break; case CTRLCHAR_NONE: @@ -421,7 +420,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, } else count -= 2; tty_insert_flip_string(tty, raw->inbuf, count); - tty_flip_buffer_push(raw->tty); + tty_flip_buffer_push(tty); break; } } else if (req->type == RAW3215_WRITE) { @@ -436,7 +435,7 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, raw->queued_read == NULL) { wake_up_interruptible(&raw->empty_wait); } - raw3215_next_io(raw); + raw3215_next_io(raw, tty); break; default: /* Strange interrupt, I'll do my best to clean up */ @@ -448,9 +447,10 @@ static void raw3215_irq(struct ccw_device *cdev, unsigned long intparm, raw->flags &= ~RAW3215_WORKING; raw3215_free_req(req); } - raw3215_next_io(raw); + raw3215_next_io(raw, tty); } - return; +put_tty: + tty_kref_put(tty); } /* @@ -946,7 +946,7 @@ static int tty3215_open(struct tty_struct *tty, struct file * filp) return -ENODEV; tty->driver_data = raw; - raw->tty = tty; + tty_port_tty_set(&raw->port, tty); tty->low_latency = 0; /* don't use bottom half for pushing chars */ /* @@ -977,7 +977,7 @@ static void tty3215_close(struct tty_struct *tty, struct file * filp) raw3215_shutdown(raw); tasklet_kill(&raw->tlet); tty->closing = 0; - raw->tty = NULL; + tty_port_tty_set(&raw->port, NULL); } /* |