[PATCH] callout removal: synclink_cs

callout removal: synclink_cs

drivers/char/pcmcia/synclink_cs.c

@@ -155,14 +155,11 @@ typedef struct _mgslpc_info {
 	struct mgsl_icount	icount;
 	
 	struct termios		normal_termios;
-	struct termios		callout_termios;
 	
 	struct tty_struct 	*tty;
 	int			timeout;
 	int			x_char;		/* xon/xoff character */
 	int			blocked_open;	/* # of blocked opens */
-	long			session;	/* Session of opening process */
-	long			pgrp;		/* pgrp of opening process */
 	unsigned char		read_status_mask;
 	unsigned char		ignore_status_mask;	
 
@@ -500,7 +497,7 @@ MODULE_LICENSE("GPL");
 static char *driver_name = "SyncLink PC Card driver";
 static char *driver_version = "$Revision: 4.10 $";
 
-static struct tty_driver serial_driver, callout_driver;
+static struct tty_driver serial_driver;
 static int serial_refcount;
 
 /* number of characters left in xmit buffer before we ask for more */
@@ -617,8 +614,7 @@ static dev_link_t *mgslpc_attach(void)
     memset(serial_table,0,sizeof(struct tty_struct*)*MAX_DEVICE_COUNT);
     memset(serial_termios,0,sizeof(struct termios*)*MAX_DEVICE_COUNT);
     memset(serial_termios_locked,0,sizeof(struct termios*)*MAX_DEVICE_COUNT);
-		
-    info->callout_termios = callout_driver.init_termios;
+
     info->normal_termios  = serial_driver.init_termios;
 
     return link;
@@ -1307,7 +1303,7 @@ void dcd_change(MGSLPC_INFO *info)
 			       (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
 		if (info->serial_signals & SerialSignal_DCD)
 			wake_up_interruptible(&info->open_wait);
-		else if (!(info->flags & (ASYNC_CALLOUT_ACTIVE | ASYNC_CALLOUT_NOHUP))) {
+		else if (!(info->flags & ASYNC_CALLOUT_NOHUP)) {
 			if (debug_level >= DEBUG_LEVEL_ISR)
 				printk("doing serial hangup...");
 			if (info->tty)
@@ -2589,9 +2585,7 @@ static void mgslpc_close(struct tty_struct *tty, struct file * filp)
 	 */
 	if (info->flags & ASYNC_NORMAL_ACTIVE)
 		info->normal_termios = *tty->termios;
-	if (info->flags & ASYNC_CALLOUT_ACTIVE)
-		info->callout_termios = *tty->termios;
-		
+
 	/* set tty->closing to notify line discipline to 
 	 * only process XON/XOFF characters. Only the N_TTY
 	 * discipline appears to use this (ppp does not).
@@ -2629,8 +2623,7 @@ static void mgslpc_close(struct tty_struct *tty, struct file * filp)
 		wake_up_interruptible(&info->open_wait);
 	}
 	
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
-			 ASYNC_CLOSING);
+	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
 			 
 	wake_up_interruptible(&info->close_wait);
 	
@@ -2723,7 +2716,7 @@ static void mgslpc_hangup(struct tty_struct *tty)
 	shutdown(info);
 	
 	info->count = 0;	
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
+	info->flags &= ~ASYNC_NORMAL_ACTIVE;
 	info->tty = 0;
 
 	wake_up_interruptible(&info->open_wait);
@@ -2744,40 +2737,16 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 		printk("%s(%d):block_til_ready on %s\n",
 			 __FILE__,__LINE__, tty->driver->name );
 
-	if (tty->driver->subtype == SERIAL_TYPE_CALLOUT) {
-		/* this is a callout device */
-		/* just verify that normal device is not in use */
-		if (info->flags & ASYNC_NORMAL_ACTIVE)
-			return -EBUSY;
-		if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
-		    (info->flags & ASYNC_SESSION_LOCKOUT) &&
-		    (info->session != current->session))
-		    return -EBUSY;
-		if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
-		    (info->flags & ASYNC_PGRP_LOCKOUT) &&
-		    (info->pgrp != current->pgrp))
-		    return -EBUSY;
-		info->flags |= ASYNC_CALLOUT_ACTIVE;
-		return 0;
-	}
-	
 	if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
 		/* nonblock mode is set or port is not enabled */
 		/* just verify that callout device is not active */
-		if (info->flags & ASYNC_CALLOUT_ACTIVE)
-			return -EBUSY;
 		info->flags |= ASYNC_NORMAL_ACTIVE;
 		return 0;
 	}
 
-	if (info->flags & ASYNC_CALLOUT_ACTIVE) {
-		if (info->normal_termios.c_cflag & CLOCAL)
-			do_clocal = 1;
-	} else {
-		if (tty->termios->c_cflag & CLOCAL)
-			do_clocal = 1;
-	}
-	
+	if (tty->termios->c_cflag & CLOCAL)
+		do_clocal = 1;
+
 	/* Wait for 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
@@ -2801,8 +2770,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	info->blocked_open++;
 	
 	while (1) {
-		if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- 		    (tty->termios->c_cflag & CBAUD)) {
+		if ((tty->termios->c_cflag & CBAUD)) {
 			spin_lock_irqsave(&info->lock,flags);
 			info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
 		 	set_signals(info);
@@ -2821,8 +2789,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
 	 	get_signals(info);
 		spin_unlock_irqrestore(&info->lock,flags);
 		
- 		if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- 		    !(info->flags & ASYNC_CLOSING) &&
+ 		if (!(info->flags & ASYNC_CLOSING) &&
  		    (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
  			break;
 		}
@@ -2926,16 +2893,10 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
 
 	if ((info->count == 1) &&
 	    info->flags & ASYNC_SPLIT_TERMIOS) {
-		if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
-			*tty->termios = info->normal_termios;
-		else 
-			*tty->termios = info->callout_termios;
+		*tty->termios = info->normal_termios;
 		mgslpc_change_params(info);
 	}
 	
-	info->session = current->session;
-	info->pgrp    = current->pgrp;
-
 	if (debug_level >= DEBUG_LEVEL_INFO)
 		printk("%s(%d):mgslpc_open(%s) success\n",
 			 __FILE__,__LINE__, info->device_name);
@@ -3232,28 +3193,13 @@ static int __init synclink_cs_init(void)
     serial_driver.tiocmget = tiocmget;
     serial_driver.tiocmset = tiocmset;
 	
-    /*
-     * The callout device is just like normal device except for
-     * major number and the subtype code.
-     */
-    callout_driver = serial_driver;
-    callout_driver.name = "cuaSLP";
-    callout_driver.major = cuamajor;
-    callout_driver.subtype = SERIAL_TYPE_CALLOUT;
-    callout_driver.read_proc = 0;
-    callout_driver.proc_entry = 0;
-
     if (tty_register_driver(&serial_driver) < 0)
 	    printk("%s(%d):Couldn't register serial driver\n",
 		   __FILE__,__LINE__);
 			
-    if (tty_register_driver(&callout_driver) < 0)
-	    printk("%s(%d):Couldn't register callout driver\n",
-		   __FILE__,__LINE__);
-
-    printk("%s %s, tty major#%d callout major#%d\n",
+    printk("%s %s, tty major#%d\n",
 	   driver_name, driver_version,
-	   serial_driver.major, callout_driver.major);
+	   serial_driver.major);
 	
     return 0;
 }
@@ -3270,9 +3216,6 @@ static void __exit synclink_cs_exit(void)
 	if ((rc = tty_unregister_driver(&serial_driver)))
 		printk("%s(%d) failed to unregister tty driver err=%d\n",
 		       __FILE__,__LINE__,rc);
-	if ((rc = tty_unregister_driver(&callout_driver)))
-		printk("%s(%d) failed to unregister callout driver err=%d\n",
-		       __FILE__,__LINE__,rc);
 
 	unregister_pccard_driver(&dev_info);
 	while (dev_list != NULL) {