openwrt/target/linux/brcm2708/patches-3.10/0146-fixes-a-bug-in-the-snd-bcm2835-driver.patch

From f7af161699cbbca544dd8feab4c05d9bc5ea8807 Mon Sep 17 00:00:00 2001
From: Janis Danisevskis <werwurm@snafu.de>
Date: Wed, 1 Jan 2014 18:41:53 +0100
Subject: [PATCH 146/174] fixes a bug in the snd-bcm2835 driver

The "instance" field of bcm2835_alsa_stream_t may be accessed uninitialized
by bcm2835_audio_set_ctls_chan if called during stream creation. This fix
deferres the addition to of the stream to chip untill it has been fully
initialized.
---
 sound/arm/bcm2835-pcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/sound/arm/bcm2835-pcm.c
+++ b/sound/arm/bcm2835-pcm.c
@@ -127,7 +127,6 @@ static int snd_bcm2835_playback_open(str
 	alsa_stream->chip = chip;
 	alsa_stream->substream = substream;
 	alsa_stream->idx = idx;
-	chip->alsa_stream[idx] = alsa_stream;
 
 	sema_init(&alsa_stream->buffers_update_sem, 0);
 	sema_init(&alsa_stream->control_sem, 0);
@@ -149,6 +148,7 @@ static int snd_bcm2835_playback_open(str
 		kfree(alsa_stream);
 		return err;
 	}
+	chip->alsa_stream[idx] = alsa_stream;
 
 	alsa_stream->open = 1;
 	alsa_stream->draining = 1;