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TTY: con3215, add tty install 

This has two outcomes:
* we give the TTY layer a tty_port
* we do not find the info structure every time open is called on that
  tty

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2012-08-07 21:47:58 +02:00 committed by Greg Kroah-Hartman
parent 3ec0a17ef5
commit d228110745
1 changed files with 15 additions and 6 deletions
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21
drivers/s390/char/con3215.c
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@ -942,6 +942,19 @@ static int __init con3215_init(void)
console_initcall(con3215_init); console_initcall(con3215_init);
#endif #endif
static int tty3215_install(struct tty_driver *driver, struct tty_struct *tty)
{
struct raw3215_info *raw;
raw = raw3215[tty->index];
if (raw == NULL)
return -ENODEV;
tty->driver_data = raw;
return tty_port_install(&raw->port, driver, tty);
}
/* /*
* tty3215_open * tty3215_open
* *
@ -949,14 +962,9 @@ console_initcall(con3215_init);
*/ */
static int tty3215_open(struct tty_struct *tty, struct file * filp) static int tty3215_open(struct tty_struct *tty, struct file * filp)
{ {
struct raw3215_info *raw; struct raw3215_info *raw = tty->driver_data;
int retval; int retval;
raw = raw3215[tty->index];
if (raw == NULL)
return -ENODEV;
tty->driver_data = raw;
tty_port_tty_set(&raw->port, tty); tty_port_tty_set(&raw->port, tty);
tty->low_latency = 0; /* don't use bottom half for pushing chars */ tty->low_latency = 0; /* don't use bottom half for pushing chars */
@ -1117,6 +1125,7 @@ static void tty3215_start(struct tty_struct *tty)
} }
static const struct tty_operations tty3215_ops = { static const struct tty_operations tty3215_ops = {
.install = tty3215_install,
.open = tty3215_open, .open = tty3215_open,
.close = tty3215_close, .close = tty3215_close,
.write = tty3215_write, .write = tty3215_write,