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From 9c6c1cef21569d9a0ef62b7d621f864e5db89994 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Fri, 29 Apr 2016 17:27:36 +0100
Subject: [PATCH] Revert "bcm2835: do not require substream for accessing chmap
ctl"
This reverts commit a05b4815196018c329ea98c24205bc6fa9c097e0.
---
sound/arm/bcm2835-ctl.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- a/sound/arm/bcm2835-ctl.c
+++ b/sound/arm/bcm2835-ctl.c
@@ -489,6 +489,8 @@ static int snd_bcm2835_chmap_ctl_get(str
{
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
bcm2835_chip_t *chip = info->private_data;
+ unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
+ struct snd_pcm_substream *substream = snd_pcm_chmap_substream(info, idx);
struct cea_channel_speaker_allocation *ch = NULL;
int res = 0;
int cur = 0;
@@ -497,6 +499,11 @@ static int snd_bcm2835_chmap_ctl_get(str
if (mutex_lock_interruptible(&chip->audio_mutex))
return -EINTR;
+ if (!substream || !substream->runtime) {
+ res = -ENODEV;
+ goto unlock;
+ }
+
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
if (channel_allocations[i].ca_index == chip->cea_chmap)
ch = &channel_allocations[i];
@@ -514,6 +521,7 @@ static int snd_bcm2835_chmap_ctl_get(str
while (cur < 8)
ucontrol->value.integer.value[cur++] = SNDRV_CHMAP_NA;
+unlock:
mutex_unlock(&chip->audio_mutex);
return res;
}
@@ -533,7 +541,7 @@ static int snd_bcm2835_chmap_ctl_put(str
return -EINTR;
if (!substream || !substream->runtime) {
- /* ignore and return success for the sake of alsactl */
+ res = -ENODEV;
goto unlock;
}
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