From: Anton Vorontsov <cbouatmailru@gmail.com>
Date: Tue, 7 Sep 2010 13:31:49 +0000 (+0400)
Subject: base/platform: Safe handling for NULL platform data and resources
X-Git-Tag: v2.6.37-rc1~156^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cfc64ceb6222aabec640ba76e89529a8fc2c1f0;p=pandora-kernel.git

base/platform: Safe handling for NULL platform data and resources

Some users of platform_device_add_{data,resources}() assume that
NULL data and resources will be handled specially, i.e. just ignored.

But the platform core ends up calling kmemdup(NULL, 0, ...), which
returns a non-NULL result (i.e. ZERO_SIZE_PTR), which causes drivers
to oops on a valid code, something like:

  if (platform_data)
  	stuff = platform_data->stuff;

This patch makes the platform core a bit more safe for such cases.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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