Commit acce73b9 authored by Alexander Viro's avatar Alexander Viro Committed by Linus Torvalds

[PATCH] callout removal: sgiserial

callout removal: sgiserial
parent c2320db8
...@@ -97,13 +97,12 @@ static unsigned char zscons_regs[16] = { ...@@ -97,13 +97,12 @@ static unsigned char zscons_regs[16] = {
DECLARE_TASK_QUEUE(tq_serial); DECLARE_TASK_QUEUE(tq_serial);
struct tty_driver serial_driver, callout_driver; struct tty_driver serial_driver;
struct console *sgisercon; struct console *sgisercon;
static int serial_refcount; static int serial_refcount;
/* serial subtype definitions */ /* serial subtype definitions */
#define SERIAL_TYPE_NORMAL 1 #define SERIAL_TYPE_NORMAL 1
#define SERIAL_TYPE_CALLOUT 2
/* number of characters left in xmit buffer before we ask for more */ /* number of characters left in xmit buffer before we ask for more */
#define WAKEUP_CHARS 256 #define WAKEUP_CHARS 256
...@@ -1514,8 +1513,6 @@ static void rs_close(struct tty_struct *tty, struct file * filp) ...@@ -1514,8 +1513,6 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
*/ */
if (info->flags & ZILOG_NORMAL_ACTIVE) if (info->flags & ZILOG_NORMAL_ACTIVE)
info->normal_termios = *tty->termios; info->normal_termios = *tty->termios;
if (info->flags & ZILOG_CALLOUT_ACTIVE)
info->callout_termios = *tty->termios;
/* /*
* Now we wait for the transmit buffer to clear; and we notify * Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters. * the line discipline to only process XON/XOFF characters.
...@@ -1561,8 +1558,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp) ...@@ -1561,8 +1558,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp)
} }
wake_up_interruptible(&info->open_wait); wake_up_interruptible(&info->open_wait);
} }
info->flags &= ~(ZILOG_NORMAL_ACTIVE|ZILOG_CALLOUT_ACTIVE| info->flags &= ~(ZILOG_NORMAL_ACTIVE|ZILOG_CLOSING);
ZILOG_CLOSING);
wake_up_interruptible(&info->close_wait); wake_up_interruptible(&info->close_wait);
restore_flags(flags); restore_flags(flags);
} }
...@@ -1581,7 +1577,7 @@ void rs_hangup(struct tty_struct *tty) ...@@ -1581,7 +1577,7 @@ void rs_hangup(struct tty_struct *tty)
shutdown(info); shutdown(info);
info->event = 0; info->event = 0;
info->count = 0; info->count = 0;
info->flags &= ~(ZILOG_NORMAL_ACTIVE|ZILOG_CALLOUT_ACTIVE); info->flags &= ~ZILOG_NORMAL_ACTIVE;
info->tty = 0; info->tty = 0;
wake_up_interruptible(&info->open_wait); wake_up_interruptible(&info->open_wait);
} }
...@@ -1614,44 +1610,18 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, ...@@ -1614,44 +1610,18 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
#endif #endif
} }
/*
* If this is a callout device, then just make sure the normal
* device isn't being used.
*/
if (tty->driver->subtype == SERIAL_TYPE_CALLOUT) {
if (info->flags & ZILOG_NORMAL_ACTIVE)
return -EBUSY;
if ((info->flags & ZILOG_CALLOUT_ACTIVE) &&
(info->flags & ZILOG_SESSION_LOCKOUT) &&
(info->session != current->session))
return -EBUSY;
if ((info->flags & ZILOG_CALLOUT_ACTIVE) &&
(info->flags & ZILOG_PGRP_LOCKOUT) &&
(info->pgrp != current->pgrp))
return -EBUSY;
info->flags |= ZILOG_CALLOUT_ACTIVE;
return 0;
}
/* /*
* If non-blocking mode is set, or the port is not enabled, * If non-blocking mode is set, or the port is not enabled,
* then make the check up front and then exit. * then make the check up front and then exit.
*/ */
if ((filp->f_flags & O_NONBLOCK) || if ((filp->f_flags & O_NONBLOCK) ||
(tty->flags & (1 << TTY_IO_ERROR))) { (tty->flags & (1 << TTY_IO_ERROR))) {
if (info->flags & ZILOG_CALLOUT_ACTIVE)
return -EBUSY;
info->flags |= ZILOG_NORMAL_ACTIVE; info->flags |= ZILOG_NORMAL_ACTIVE;
return 0; return 0;
} }
if (info->flags & ZILOG_CALLOUT_ACTIVE) {
if (info->normal_termios.c_cflag & CLOCAL)
do_clocal = 1;
} else {
if (tty->termios->c_cflag & CLOCAL) if (tty->termios->c_cflag & CLOCAL)
do_clocal = 1; do_clocal = 1;
}
/* /*
* Block waiting for the carrier detect and the line to become * Block waiting for the carrier detect and the line to become
...@@ -1670,7 +1640,6 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, ...@@ -1670,7 +1640,6 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
info->blocked_open++; info->blocked_open++;
while (1) { while (1) {
cli(); cli();
if (!(info->flags & ZILOG_CALLOUT_ACTIVE))
zs_rtsdtr(info, 1); zs_rtsdtr(info, 1);
sti(); sti();
set_current_state(TASK_INTERRUPTIBLE); set_current_state(TASK_INTERRUPTIBLE);
...@@ -1686,8 +1655,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, ...@@ -1686,8 +1655,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp,
#endif #endif
break; break;
} }
if (!(info->flags & ZILOG_CALLOUT_ACTIVE) && if (!(info->flags & ZILOG_CLOSING) && do_clocal)
!(info->flags & ZILOG_CLOSING) && do_clocal)
break; break;
if (signal_pending(current)) { if (signal_pending(current)) {
retval = -ERESTARTSYS; retval = -ERESTARTSYS;
...@@ -1761,10 +1729,7 @@ int rs_open(struct tty_struct *tty, struct file * filp) ...@@ -1761,10 +1729,7 @@ int rs_open(struct tty_struct *tty, struct file * filp)
} }
if ((info->count == 1) && (info->flags & ZILOG_SPLIT_TERMIOS)) { if ((info->count == 1) && (info->flags & ZILOG_SPLIT_TERMIOS)) {
if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
*tty->termios = info->normal_termios; *tty->termios = info->normal_termios;
else
*tty->termios = info->callout_termios;
change_speed(info); change_speed(info);
} }
...@@ -1776,9 +1741,6 @@ int rs_open(struct tty_struct *tty, struct file * filp) ...@@ -1776,9 +1741,6 @@ int rs_open(struct tty_struct *tty, struct file * filp)
change_speed(info); change_speed(info);
} }
info->session = current->session;
info->pgrp = current->pgrp;
#ifdef SERIAL_DEBUG_OPEN #ifdef SERIAL_DEBUG_OPEN
printk("rs_open %s successful...\n", tty->name); printk("rs_open %s successful...\n", tty->name);
#endif #endif
...@@ -1899,19 +1861,8 @@ int rs_init(void) ...@@ -1899,19 +1861,8 @@ int rs_init(void)
serial_driver.start = rs_start; serial_driver.start = rs_start;
serial_driver.hangup = rs_hangup; serial_driver.hangup = rs_hangup;
/*
* The callout device is just like normal device except for
* major number and the subtype code.
*/
callout_driver = serial_driver;
callout_driver.name = "cua";
callout_driver.major = TTYAUX_MAJOR;
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
if (tty_register_driver(&serial_driver)) if (tty_register_driver(&serial_driver))
panic("Couldn't register serial driver\n"); panic("Couldn't register serial driver\n");
if (tty_register_driver(&callout_driver))
panic("Couldn't register callout driver\n");
save_flags(flags); cli(); save_flags(flags); cli();
...@@ -1999,7 +1950,6 @@ int rs_init(void) ...@@ -1999,7 +1950,6 @@ int rs_init(void)
info->tqueue.data = info; info->tqueue.data = info;
info->tqueue_hangup.routine = do_serial_hangup; info->tqueue_hangup.routine = do_serial_hangup;
info->tqueue_hangup.data = info; info->tqueue_hangup.data = info;
info->callout_termios =callout_driver.init_termios;
info->normal_termios = serial_driver.init_termios; info->normal_termios = serial_driver.init_termios;
init_waitqueue_head(&info->open_wait); init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait); init_waitqueue_head(&info->close_wait);
......
...@@ -148,8 +148,6 @@ struct sgi_serial { ...@@ -148,8 +148,6 @@ struct sgi_serial {
int line; int line;
int count; /* # of fd on device */ int count; /* # of fd on device */
int blocked_open; /* # of blocked opens */ int blocked_open; /* # of blocked opens */
long session; /* Session of opening process */
long pgrp; /* pgrp of opening process */
unsigned char *xmit_buf; unsigned char *xmit_buf;
int xmit_head; int xmit_head;
int xmit_tail; int xmit_tail;
...@@ -157,7 +155,6 @@ struct sgi_serial { ...@@ -157,7 +155,6 @@ struct sgi_serial {
struct tq_struct tqueue; struct tq_struct tqueue;
struct tq_struct tqueue_hangup; struct tq_struct tqueue_hangup;
struct termios normal_termios; struct termios normal_termios;
struct termios callout_termios;
wait_queue_head_t open_wait; wait_queue_head_t open_wait;
wait_queue_head_t close_wait; wait_queue_head_t close_wait;
}; };
......
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