openwrtv3/target/linux/brcm2708/patches-4.4/0249-bcm2835-do-not-require-substream-for-accessing-chmap.patch
Álvaro Fernández Rojas 2b1c6b21b5 brcm2708: update linux 4.4 patches to latest version
As usual these patches were extracted and rebased from the raspberry pi repo:
https://github.com/raspberrypi/linux/tree/rpi-4.4.y

Also adds support for Raspberry Pi Compute Module 3 (untested).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2016-09-10 14:54:26 +02:00

50 lines
1.6 KiB
Diff

From 955fba9c62f43238b5c3687a78ed812ac95edd44 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Tue, 19 Apr 2016 16:08:35 +0200
Subject: [PATCH] bcm2835: do not require substream for accessing chmap ctl
Fixes alsasctl store/restore operation.
---
sound/arm/bcm2835-ctl.c | 10 +---------
1 file changed, 1 insertion(+), 9 deletions(-)
--- a/sound/arm/bcm2835-ctl.c
+++ b/sound/arm/bcm2835-ctl.c
@@ -489,8 +489,6 @@ 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;
@@ -499,11 +497,6 @@ 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];
@@ -521,7 +514,6 @@ 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;
}
@@ -541,7 +533,7 @@ static int snd_bcm2835_chmap_ctl_put(str
return -EINTR;
if (!substream || !substream->runtime) {
- res = -ENODEV;
+ /* ignore and return success for the sake of alsactl */
goto unlock;
}