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

   1 From f7af161699cbbca544dd8feab4c05d9bc5ea8807 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 146/174] 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 --- a/sound/arm/bcm2835-pcm.c
  15 +++ b/sound/arm/bcm2835-pcm.c
  16 @@ -127,7 +127,6 @@ static int snd_bcm2835_playback_open(str
  17         alsa_stream->chip = chip;
  18         alsa_stream->substream = substream;
  19         alsa_stream->idx = idx;
  20 -       chip->alsa_stream[idx] = alsa_stream;
  21
  22         sema_init(&alsa_stream->buffers_update_sem, 0);
  23         sema_init(&alsa_stream->control_sem, 0);
  24 @@ -149,6 +148,7 @@ static int snd_bcm2835_playback_open(str
  25                 kfree(alsa_stream);
  26                 return err;
  27         }
  28 +       chip->alsa_stream[idx] = alsa_stream;
  29
  30         alsa_stream->open = 1;
  31         alsa_stream->draining = 1;