From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Wed, 15 Oct 2008 16:07:47 +0000 (+0100)
Subject: ALSA: Handle NULL jacks in snd_jack_report()
X-Git-Tag: v2.6.28-rc1~20^2~1^2~3
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=9a3f371e9962749e5bdcf45a3bebdba555651a2b;p=linux-2.6-block.git

ALSA: Handle NULL jacks in snd_jack_report()

Facilitate drivers that wish to carry on if they can't create a jack
input device by handling attempts to report the state of a NULL jack,
removing the need to check for initialisation before use.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/core/jack.c b/sound/core/jack.c
index 8133a2b173a5..bd2d9e6b55e9 100644
--- a/sound/core/jack.c
+++ b/sound/core/jack.c
@@ -147,6 +147,9 @@ EXPORT_SYMBOL(snd_jack_set_parent);
  */
 void snd_jack_report(struct snd_jack *jack, int status)
 {
+	if (!jack)
+		return;
+
 	if (jack->type & SND_JACK_HEADPHONE)
 		input_report_switch(jack->input_dev, SW_HEADPHONE_INSERT,
 				    status & SND_JACK_HEADPHONE);