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Subject[PATCH 18/69] TTY: isdn, use tty_port_block_til_ready helper
Date
This removes a bunch of duplicated code which does the same as
tty_port_block_til_ready does.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
---
drivers/isdn/i4l/isdn_tty.c | 97 +------------------------------------------
1 file changed, 1 insertion(+), 96 deletions(-)

diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index b41a80a..7bc5067 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1486,101 +1486,6 @@ isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
* ------------------------------------------------------------
*/

-static int
-isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info *info)
-{
- struct tty_port *port = &info->port;
- DECLARE_WAITQUEUE(wait, NULL);
- int do_clocal = 0;
- int retval;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) ||
- (port->flags & ASYNC_CLOSING)) {
- if (port->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&port->close_wait);
-#ifdef MODEM_DO_RESTART
- if (port->flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
-#else
- return -EAGAIN;
-#endif
- }
- /*
- * If non-blocking mode is set, then make the check up front
- * and then exit.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
- port->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * isdn_tty_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&port->open_wait, &wait);
-#ifdef ISDN_DEBUG_MODEM_OPEN
- printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
- info->line, info->count);
-#endif
- if (!(tty_hung_up_p(filp)))
- port->count--;
- port->blocked_open++;
- while (1) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(port->flags & ASYNC_INITIALIZED)) {
-#ifdef MODEM_DO_RESTART
- if (port->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- if (!(port->flags & ASYNC_CLOSING) &&
- (do_clocal || tty_port_carrier_raised(port))) {
- break;
- }
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-#ifdef ISDN_DEBUG_MODEM_OPEN
- printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
- info->line, port->count);
-#endif
- schedule();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&port->open_wait, &wait);
- if (!tty_hung_up_p(filp))
- port->count++;
- port->blocked_open--;
-#ifdef ISDN_DEBUG_MODEM_OPEN
- printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
- info->line, port->count);
-#endif
- if (retval)
- return retval;
- port->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
-}
-
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its async structure into
@@ -1616,7 +1521,7 @@ isdn_tty_open(struct tty_struct *tty, struct file *filp)
#endif
return retval;
}
- retval = isdn_tty_block_til_ready(tty, filp, info);
+ retval = tty_port_block_til_ready(port, tty, filp);
if (retval) {
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
--
1.7.9.2



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