From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 17 Nov 2005 15:00:01 +0000 (+0100)
Subject: [ALSA] ac97 - NULL check in snd_ac97_suspend/resume
X-Git-Tag: v2.6.16-rc1~474^2~22^2~3^2~148
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e26e7545e9542425f140cb4c605a7ab5a3b13e00;p=linux-2.6

[ALSA] ac97 - NULL check in snd_ac97_suspend/resume

Modules: AC97 Codec

Add NULL check in snd_ac97_suspend() and snd_ac97_resume() so that
the caller doesn't have to do it by itself.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c
index 9faeaefc8e..abc83fa85b 100644
--- a/sound/pci/ac97/ac97_codec.c
+++ b/sound/pci/ac97/ac97_codec.c
@@ -2186,6 +2186,8 @@ static void snd_ac97_powerdown(struct snd_ac97 *ac97)
  */
 void snd_ac97_suspend(struct snd_ac97 *ac97)
 {
+	if (! ac97)
+		return;
 	if (ac97->build_ops->suspend)
 		ac97->build_ops->suspend(ac97);
 	snd_ac97_powerdown(ac97);
@@ -2242,6 +2244,9 @@ void snd_ac97_resume(struct snd_ac97 *ac97)
 {
 	unsigned long end_time;
 
+	if (! ac97)
+		return;
+
 	if (ac97->bus->ops->reset) {
 		ac97->bus->ops->reset(ac97);
 		goto  __reset_ready;