tty: TIOCGSOFTCAR/SSOFTCAR on pty is wron

The termios settings ioctls on a pty should affect the bound tty side not
the pty. The SOFTCAR ioctls use the wrong device file.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index ea9fc5d03b99..bf34e4597421 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -937,12 +937,14 @@ int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
                         return 0;
 #endif
         case TIOCGSOFTCAR:
-                return put_user(C_CLOCAL(tty) ? 1 : 0,
+                /* FIXME: for correctness we may need to take the termios
+                   lock here - review */
+                return put_user(C_CLOCAL(real_tty) ? 1 : 0,
                                                 (int __user *)arg);
         case TIOCSSOFTCAR:
                 if (get_user(arg, (unsigned int __user *) arg))
                         return -EFAULT;
-                return tty_change_softcar(tty, arg);
+                return tty_change_softcar(real_tty, arg);
         default:
                 return -ENOIOCTLCMD;
         }