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path: root/drivers/s390/char/sclp_tty.c
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Diffstat (limited to 'drivers/s390/char/sclp_tty.c')
-rw-r--r--drivers/s390/char/sclp_tty.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 40a9d69c898e..e66a75b3822c 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -48,7 +48,7 @@ static struct sclp_buffer *sclp_ttybuf;
/* Timer for delayed output of console messages. */
static struct timer_list sclp_tty_timer;
-static struct tty_struct *sclp_tty;
+static struct tty_port sclp_port;
static unsigned char sclp_tty_chars[SCLP_TTY_BUF_SIZE];
static unsigned short int sclp_tty_chars_count;
@@ -64,7 +64,7 @@ static int sclp_tty_columns = 80;
static int
sclp_tty_open(struct tty_struct *tty, struct file *filp)
{
- sclp_tty = tty;
+ tty_port_tty_set(&sclp_port, tty);
tty->driver_data = NULL;
tty->low_latency = 0;
return 0;
@@ -76,7 +76,7 @@ sclp_tty_close(struct tty_struct *tty, struct file *filp)
{
if (tty->count > 1)
return;
- sclp_tty = NULL;
+ tty_port_tty_set(&sclp_port, NULL);
}
/*
@@ -108,6 +108,7 @@ sclp_tty_write_room (struct tty_struct *tty)
static void
sclp_ttybuf_callback(struct sclp_buffer *buffer, int rc)
{
+ struct tty_struct *tty;
unsigned long flags;
void *page;
@@ -126,8 +127,10 @@ sclp_ttybuf_callback(struct sclp_buffer *buffer, int rc)
spin_unlock_irqrestore(&sclp_tty_lock, flags);
} while (buffer && sclp_emit_buffer(buffer, sclp_ttybuf_callback));
/* check if the tty needs a wake up call */
- if (sclp_tty != NULL) {
- tty_wakeup(sclp_tty);
+ tty = tty_port_tty_get(&sclp_port);
+ if (tty != NULL) {
+ tty_wakeup(tty);
+ tty_kref_put(tty);
}
}
@@ -326,21 +329,22 @@ sclp_tty_flush_buffer(struct tty_struct *tty)
static void
sclp_tty_input(unsigned char* buf, unsigned int count)
{
+ struct tty_struct *tty = tty_port_tty_get(&sclp_port);
unsigned int cchar;
/*
* If this tty driver is currently closed
* then throw the received input away.
*/
- if (sclp_tty == NULL)
+ if (tty == NULL)
return;
- cchar = ctrlchar_handle(buf, count, sclp_tty);
+ cchar = ctrlchar_handle(buf, count, tty);
switch (cchar & CTRLCHAR_MASK) {
case CTRLCHAR_SYSRQ:
break;
case CTRLCHAR_CTRL:
- tty_insert_flip_char(sclp_tty, cchar, TTY_NORMAL);
- tty_flip_buffer_push(sclp_tty);
+ tty_insert_flip_char(tty, cchar, TTY_NORMAL);
+ tty_flip_buffer_push(tty);
break;
case CTRLCHAR_NONE:
/* send (normal) input to line discipline */
@@ -348,13 +352,14 @@ sclp_tty_input(unsigned char* buf, unsigned int count)
(strncmp((const char *) buf + count - 2, "^n", 2) &&
strncmp((const char *) buf + count - 2, "\252n", 2))) {
/* add the auto \n */
- tty_insert_flip_string(sclp_tty, buf, count);
- tty_insert_flip_char(sclp_tty, '\n', TTY_NORMAL);
+ tty_insert_flip_string(tty, buf, count);
+ tty_insert_flip_char(tty, '\n', TTY_NORMAL);
} else
- tty_insert_flip_string(sclp_tty, buf, count - 2);
- tty_flip_buffer_push(sclp_tty);
+ tty_insert_flip_string(tty, buf, count - 2);
+ tty_flip_buffer_push(tty);
break;
}
+ tty_kref_put(tty);
}
/*
@@ -543,7 +548,7 @@ sclp_tty_init(void)
sclp_tty_tolower = 1;
}
sclp_tty_chars_count = 0;
- sclp_tty = NULL;
+ tty_port_init(&sclp_port);
rc = sclp_register(&sclp_input_event);
if (rc) {