[PATCH 1/1] TTY: pty, lookup retval fixup

[Jiri Slaby]

Make sure we fail on NULL return value possibly returned by
master tty lookup.

Convert NULL to ERR_PTR(-ENODEV) in ptm_unix98_lookup, since NULL
is not captured by IS_ERR() in __tty_open.

Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
---
 drivers/char/pty.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 31038a0..261223b 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -508,7 +508,7 @@ static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
 	struct tty_struct *tty = devpts_get_tty(ptm_inode, idx);
 	if (tty)
 		tty = tty->link;
-	return tty;
+	return tty ? : ERR_PTR(-ENODEV);
 }
 
 /**
-- 
1.6.1.2

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