From: Andy Whitcroft <apw@shadowen.org>
Date: Sun, 6 May 2007 21:49:33 +0000 (-0700)
Subject: tty_register_driver: only allocate tty instances when defined
X-Git-Tag: v2.6.22-rc1~969
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=543691a6cd70b606dd9bed5e77b120c5d9c5c506;p=pandora-kernel.git

tty_register_driver: only allocate tty instances when defined

If device->num is zero we attempt to kmalloc() zero bytes.  When SLUB is
enabled this returns a null pointer and take that as an allocation failure
and fail the device register.  Check for no devices and avoid the
allocation.

[akpm: opportunistic kzalloc() conversion]
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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