From: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Date: Tue, 9 Oct 2007 08:34:06 +0000 (+0200)
Subject: [ALSA] sound: snd_register_device_for_dev fix
X-Git-Tag: v2.6.24-rc1~832^2~24
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2469049e728ee0542d6617f81311a18a14e73826;p=pandora-kernel.git

[ALSA] sound: snd_register_device_for_dev fix

snd_register_device_for_dev() can oops when device_create() returns
ERR_PTR(err).
Scenario:
preg->dev = device_create(...); /* fails */
if (preg->dev) /* contains ERR_PTR(err) */
	dev_set_drvdata(preg->dev, private_data);
and dev_set_drvdata() looks like this:
static inline void
dev_set_drvdata (struct device *dev, void *data)
{
	dev->driver_data = data; <--- boom
}
This patch should prevent that.

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
---

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