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

   1 From bd15c8ebc85f89b3e3c464a628f70ea4b144377f Mon Sep 17 00:00:00 2001
   2 From: Janis Danisevskis <werwurm@snafu.de>
   3 Date: Wed, 1 Jan 2014 18:41:53 +0100
   4 Subject: [PATCH 146/196] fixes a bug in the snd-bcm2835 driver
   5
   6 The "instance" field of bcm2835_alsa_stream_t may be accessed uninitialized
   7 by bcm2835_audio_set_ctls_chan if called during stream creation. This fix
   8 deferres the addition to of the stream to chip untill it has been fully
   9 initialized.
  10 ---
  11  sound/arm/bcm2835-pcm.c | 2 +-
  12  1 file changed, 1 insertion(+), 1 deletion(-)
  13
  14 diff --git a/sound/arm/bcm2835-pcm.c b/sound/arm/bcm2835-pcm.c
  15 index 21e435b..499e225 100755
  16 --- a/sound/arm/bcm2835-pcm.c
  17 +++ b/sound/arm/bcm2835-pcm.c
  18 @@ -127,7 +127,6 @@ static int snd_bcm2835_playback_open(struct snd_pcm_substream *substream)
  19         alsa_stream->chip = chip;
  20         alsa_stream->substream = substream;
  21         alsa_stream->idx = idx;
  22 -       chip->alsa_stream[idx] = alsa_stream;
  23
  24         sema_init(&alsa_stream->buffers_update_sem, 0);
  25         sema_init(&alsa_stream->control_sem, 0);
  26 @@ -149,6 +148,7 @@ static int snd_bcm2835_playback_open(struct snd_pcm_substream *substream)
  27                 kfree(alsa_stream);
  28                 return err;
  29         }
  30 +       chip->alsa_stream[idx] = alsa_stream;
  31
  32         alsa_stream->open = 1;
  33         alsa_stream->draining = 1;
  34 --
  35 1.9.1
  36