[PATCH] jantior: sx: use get/put_user (remove verify_area)

From: Domen Puncer <domen@coderock.org>

Use get_user/put_user to check user addressing,
don't need to use verify_area also.

drivers/char/sx.c

@@ -1760,9 +1760,7 @@ static int sx_ioctl (struct tty_struct * tty, struct file * filp,
 		              (unsigned int *) arg);
 		break;
 	case TIOCSSOFTCAR:
-		if ((rc = verify_area(VERIFY_READ, (void *) arg,
-		                      sizeof(int))) == 0) {
-			get_user(ival, (unsigned int *) arg);
+		if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
 			tty->termios->c_cflag =
 				(tty->termios->c_cflag & ~CLOCAL) |
 				(ival ? CLOCAL : 0);
@@ -1786,27 +1784,21 @@ static int sx_ioctl (struct tty_struct * tty, struct file * filp,
 		}
 		break;
 	case TIOCMBIS:
-		if ((rc = verify_area(VERIFY_READ, (void *) arg,
-		                      sizeof(unsigned int))) == 0) {
-			get_user(ival, (unsigned int *) arg);
+		if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
 			sx_setsignals(port, ((ival & TIOCM_DTR) ? 1 : -1),
 			                     ((ival & TIOCM_RTS) ? 1 : -1));
 			sx_reconfigure_port(port);
 		}
 		break;
 	case TIOCMBIC:
-		if ((rc = verify_area(VERIFY_READ, (void *) arg,
-		                      sizeof(unsigned int))) == 0) {
-			get_user(ival, (unsigned int *) arg);
+		if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
 			sx_setsignals(port, ((ival & TIOCM_DTR) ? 0 : -1),
 			                     ((ival & TIOCM_RTS) ? 0 : -1));
 			sx_reconfigure_port(port);
 		}
 		break;
 	case TIOCMSET:
-		if ((rc = verify_area(VERIFY_READ, (void *) arg,
-		                      sizeof(unsigned int))) == 0) {
-			get_user(ival, (unsigned int *) arg);
+		if ((rc = get_user(ival, (unsigned int *) arg)) == 0) {
 			sx_setsignals(port, ((ival & TIOCM_DTR) ? 1 : 0),
 			                     ((ival & TIOCM_RTS) ? 1 : 0));
 			sx_reconfigure_port(port);