From: Dan Aloni <da-x@gmx.net>
To: Linux Kernel List <linux-kernel@vger.kernel.org>
Cc: Andrew Morton <akpm@osdl.org>
Subject: [PATCH] missing NULL check in drivers/char/n_tty.c
Date: Mon, 21 Jun 2004 09:38:45 +0300 [thread overview]
Message-ID: <20040621063845.GA6379@callisto.yi.org> (raw)
Hello,
The rest of the kernel treats tty->driver->chars_in_buffer as a possible
NULL. This patch changes normal_poll() to be consistent with the rest of
the code.
Signed-off-by: Dan Aloni <da-x@colinux.org>
BTW, who is currently maintaining the tty subsystem?
--- linux-2.6.7/drivers/char/n_tty.c 2004-06-21 09:30:11.000000000 +0300
+++ linux-2.6.7/drivers/char/n_tty.c 2004-06-21 09:28:04.000000000 +0300
@@ -1272,8 +1272,8 @@
else
tty->minimum_to_wake = 1;
}
- if (tty->driver->chars_in_buffer(tty) < WAKEUP_CHARS &&
- tty->driver->write_room(tty) > 0)
+ if ((!tty->driver->chars_in_buffer || tty->driver->chars_in_buffer(tty) < WAKEUP_CHARS)
+ && tty->driver->write_room(tty) > 0)
mask |= POLLOUT | POLLWRNORM;
return mask;
}
--
Dan Aloni
da-x@colinux.org
next reply other threads:[~2004-06-21 6:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-21 6:38 Dan Aloni [this message]
2004-06-21 6:58 ` Andrew Morton
2004-06-21 7:36 ` Dan Aloni
2004-06-21 7:39 ` Andrew Morton
2004-06-21 8:24 ` Dan Aloni
2004-06-21 15:06 ` Paul Fulghum
2004-06-21 18:46 ` Andrew Morton
2004-06-21 19:52 ` Paul Fulghum
2004-06-21 22:48 ` Dan Aloni
2004-06-21 23:56 ` Paul Fulghum
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