patch-2.4.20 linux-2.4.20/drivers/char/tty_io.c

• Lines: 58
• Date: Thu Nov 28 15:53:12 2002
• Orig file: linux-2.4.19/drivers/char/tty_io.c
• Orig date: Fri Aug 2 17:39:43 2002

diff -urN linux-2.4.19/drivers/char/tty_io.c linux-2.4.20/drivers/char/tty_io.c
@@ -106,6 +106,8 @@
 extern void con_init_devfs (void);
 #endif
 
+extern void disable_early_printk(void);
+
 #define CONSOLE_DEV MKDEV(TTY_MAJOR,0)
 #define TTY_DEV MKDEV(TTYAUX_MAJOR,0)
 #define SYSCONS_DEV MKDEV(TTYAUX_MAJOR,1)
@@ -1659,6 +1661,21 @@
 	return 0;
 }
 
+static int tty_generic_brk(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	if (cmd == TCSBRK && arg) 
+	{
+		/* tcdrain case */
+		int retval = tty_check_change(tty);
+		if (retval)
+			return retval;
+		tty_wait_until_sent(tty, 0);
+		if (signal_pending(current))
+			return -EINTR;
+	}
+	return 0;
+}
+
 /*
  * Split this up, as gcc can choke on it otherwise..
  */
@@ -1692,11 +1709,12 @@
 		/* the driver doesn't support them. */
 		case TCSBRK:
 		case TCSBRKP:
-			if (!tty->driver.ioctl)
-				return 0;
-			retval = tty->driver.ioctl(tty, file, cmd, arg);
+			retval = -ENOIOCTLCMD;
+			if (tty->driver.ioctl)
+				retval = tty->driver.ioctl(tty, file, cmd, arg);
+			/* Not driver handled */
 			if (retval == -ENOIOCTLCMD)
-				retval = 0;
+				retval = tty_generic_brk(tty, file, cmd, arg);
 			return retval;
 		}
 	}
@@ -2184,6 +2202,9 @@
 	 * set up the console device so that later boot sequences can 
 	 * inform about problems etc..
 	 */
+#ifdef CONFIG_EARLY_PRINTK
+	disable_early_printk(); 
+#endif
 #ifdef CONFIG_VT
 	con_init();
 #endif