target/linux/brcm2708/patches-4.4/0249-bcm2835-do-not-require-substream-for-accessing-chmap.patch

   1 From 74f05075c9f20865651019acc76ac0cf957eebbf Mon Sep 17 00:00:00 2001
   2 From: wm4 <wm4@nowhere>
   3 Date: Tue, 19 Apr 2016 16:08:35 +0200
   4 Subject: [PATCH 249/304] bcm2835: do not require substream for accessing chmap
   5  ctl
   6
   7 Fixes alsasctl store/restore operation.
   8 ---
   9  sound/arm/bcm2835-ctl.c | 10 +---------
  10  1 file changed, 1 insertion(+), 9 deletions(-)
  11
  12 --- a/sound/arm/bcm2835-ctl.c
  13 +++ b/sound/arm/bcm2835-ctl.c
  14 @@ -489,8 +489,6 @@ static int snd_bcm2835_chmap_ctl_get(str
  15  {
  16         struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
  17         bcm2835_chip_t *chip = info->private_data;
  18 -       unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
  19 -       struct snd_pcm_substream *substream = snd_pcm_chmap_substream(info, idx);
  20         struct cea_channel_speaker_allocation *ch = NULL;
  21         int res = 0;
  22         int cur = 0;
  23 @@ -499,11 +497,6 @@ static int snd_bcm2835_chmap_ctl_get(str
  24         if (mutex_lock_interruptible(&chip->audio_mutex))
  25                 return -EINTR;
  26
  27 -       if (!substream || !substream->runtime) {
  28 -               res = -ENODEV;
  29 -               goto unlock;
  30 -       }
  31 -
  32         for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
  33                 if (channel_allocations[i].ca_index == chip->cea_chmap)
  34                         ch = &channel_allocations[i];
  35 @@ -521,7 +514,6 @@ static int snd_bcm2835_chmap_ctl_get(str
  36         while (cur < 8)
  37                 ucontrol->value.integer.value[cur++] = SNDRV_CHMAP_NA;
  38
  39 -unlock:
  40         mutex_unlock(&chip->audio_mutex);
  41         return res;
  42  }
  43 @@ -541,7 +533,7 @@ static int snd_bcm2835_chmap_ctl_put(str
  44                 return -EINTR;
  45
  46         if (!substream || !substream->runtime) {
  47 -               res = -ENODEV;
  48 +               /* ignore and return success for the sake of alsactl */
  49                 goto unlock;
  50         }
  51