dab5a44067
n As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
51 lines
1.6 KiB
Diff
51 lines
1.6 KiB
Diff
From ba83dd0869f15c33c016de9e061e15cca66327bd Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Fri, 29 Apr 2016 17:27:36 +0100
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Subject: [PATCH] Revert "bcm2835: do not require substream for accessing chmap
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ctl"
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This reverts commit a05b4815196018c329ea98c24205bc6fa9c097e0.
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---
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sound/arm/bcm2835-ctl.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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--- a/sound/arm/bcm2835-ctl.c
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+++ b/sound/arm/bcm2835-ctl.c
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@@ -489,6 +489,8 @@ static int snd_bcm2835_chmap_ctl_get(str
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{
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struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
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bcm2835_chip_t *chip = info->private_data;
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+ unsigned int idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
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+ struct snd_pcm_substream *substream = snd_pcm_chmap_substream(info, idx);
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struct cea_channel_speaker_allocation *ch = NULL;
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int res = 0;
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int cur = 0;
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@@ -497,6 +499,11 @@ static int snd_bcm2835_chmap_ctl_get(str
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if (mutex_lock_interruptible(&chip->audio_mutex))
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return -EINTR;
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+ if (!substream || !substream->runtime) {
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+ res = -ENODEV;
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+ goto unlock;
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+ }
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+
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for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) {
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if (channel_allocations[i].ca_index == chip->cea_chmap)
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ch = &channel_allocations[i];
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@@ -514,6 +521,7 @@ static int snd_bcm2835_chmap_ctl_get(str
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while (cur < 8)
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ucontrol->value.integer.value[cur++] = SNDRV_CHMAP_NA;
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+unlock:
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mutex_unlock(&chip->audio_mutex);
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return res;
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}
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@@ -533,7 +541,7 @@ static int snd_bcm2835_chmap_ctl_put(str
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return -EINTR;
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if (!substream || !substream->runtime) {
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- /* ignore and return success for the sake of alsactl */
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+ res = -ENODEV;
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goto unlock;
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}
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