linux-kernel - [PATCH 23/80] nozomi: Fix close on error

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Message-ID: <20081013093529.21645.85336.stgit@localhost.localdomain>
Date:	Mon, 13 Oct 2008 10:35:33 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH 23/80] nozomi: Fix close on error

From: Alan Cox <alan@...hat.com>

Nozomi assumes the close method isn't called if open errors. The tty layer
is different to other drives in this respect however. Pointed out by Denis J
Barrow.

Signed-off-by: Alan Cox <alan@...hat.com>
---

 drivers/char/nozomi.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)


diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 66a0f93..9a34a19 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1599,7 +1599,10 @@ static int ntty_open(struct tty_struct *tty, struct file *file)
 	return 0;
 }
 
-/* Called when the userspace process close the tty, /dev/noz*. */
+/* Called when the userspace process close the tty, /dev/noz*. Also
+   called immediately if ntty_open fails in which case tty->driver_data
+   will be NULL an we exit by the first return */
+
 static void ntty_close(struct tty_struct *tty, struct file *file)
 {
 	struct nozomi *dc = get_dc_by_tty(tty);

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