tty: Termios locking - sort out real_tty confusions and lock reads

commit 8f520021837d45c47d0ab57e7271f8d88bf7f3a4 upstream

(only the tty_io.c portion of this commit)

This moves us towards sanity and should mean our termios locking is now
complete and comprehensive.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index e4dce87095410f8f648137ecb992927a6630c483..0232485ddad193f2348400c2884210b6ed7c44df 100644 (file)
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -2996,7 +2996,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        case TIOCSTI:
                return tiocsti(tty, p);
        case TIOCGWINSZ:
-               return tiocgwinsz(tty, p);
+               return tiocgwinsz(real_tty, p);
        case TIOCSWINSZ:
                return tiocswinsz(tty, real_tty, p);
        case TIOCCONS: