patch "tty: fix compat TIOCGSERIAL checking wrong function ptr" added to tty-linus

This is a note to let you know that I've just added the patch titled

tty: fix compat TIOCGSERIAL checking wrong function ptr

to my tty git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
in the tty-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 6e622cd8bd888c7fa3ee2b7dfb3514ab53b21570 Mon Sep 17 00:00:00 2001
From: Eric Biggers <[email protected]>
Date: Mon, 24 Feb 2020 10:20:44 -0800
Subject: tty: fix compat TIOCGSERIAL checking wrong function ptr

Commit 77654350306a ("take compat TIOC[SG]SERIAL treatment into tty_compat_ioctl()") changed the compat version of TIOCGSERIAL to start checking for the presence of the ->set_serial function pointer rather than ->get_serial. This appears to be a copy-and-paste error, since ->get_serial is the function pointer that is called as well as the pointer that is checked by the non-compat version of TIOCGSERIAL.

Fix this by checking the correct function pointer.

---
 drivers/tty/tty_io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index db4a13bc855e..5a6f36b391d9 100644
@@ -2734,7 +2734,7 @@ static int compat_tty_tiocgserial(struct tty_struct *tty,
 	memset(&v, 0, sizeof(v));
 	memset(&v32, 0, sizeof(v32));
 
-	if (!tty->ops->set_serial)
+	if (!tty->ops->get_serial)
 		return -ENOTTY;
 	err = tty->ops->get_serial(tty, &v);
 	if (!err) {

2.25.1