[alsa-devel] Applied "ASoC: core: Don't probe the component which is dummy" to the asoc tree

[Mark Brown]

The patch

   ASoC: core: Don't probe the component which is dummy

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 6e78108bda78adbb2d4ef55ec60a388aba975797 Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang at freescale.com>
Date: Fri, 3 Jul 2015 16:30:30 +0800
Subject: [PATCH] ASoC: core: Don't probe the component which is dummy

Dummy dai can be used by multiple sound card. But it only belong to one
card's dapm list. If another card use it, there will be dapm_assert_locked
warning.

[   20.015782] WARNING: CPU: 1 PID: 661 at sound/soc/soc-dapm.c:124 dapm_assert_locked.isra.36+0x4c/0x58()
[   20.025249] Modules linked in:
[   20.028349] CPU: 1 PID: 661 Comm: aplay Not tainted 4.1.0-rc6-next-20150605-00004-gaee05d8-dirty #92
[   20.037528] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[   20.044110] Backtrace:
[   20.046614] [<80012e00>] (dump_backtrace) from [<80012fa0>] (show_stack+0x18/0x1c)
[   20.054229]  r6:809e8060 r5:00000000 r4:00000000 r3:00000000
[   20.060002] [<80012f88>] (show_stack) from [<807a0f74>] (dump_stack+0x80/0x9c)
[   20.067293] [<807a0ef4>] (dump_stack) from [<8002b144>] (warn_slowpath_common+0x7c/0xb4)
[   20.075427]  r5:0000007c r4:00000000
[   20.079065] [<8002b0c8>] (warn_slowpath_common) from [<8002b1a0>] (warn_slowpath_null+0x24/0x2c)
[   20.087898]  r8:00000001 r7:88007c28 r6:ed94a680 r5:809e83e4 r4:ed83d6c0
[   20.094747] [<8002b17c>] (warn_slowpath_null) from [<8058403c>] (dapm_assert_locked.isra.36+0x4c/0x58)
[   20.104101] [<80583ff0>] (dapm_assert_locked.isra.36) from [<805842ec>] (dapm_mark_dirty+0x64/0xa4)
[   20.113165] [<80584288>] (dapm_mark_dirty) from [<805853a8>] (soc_dapm_dai_stream_event.isra.42+0x30/0xc8)
[   20.122863]  r8:ed9b5dbc r7:00000000 r6:00000001 r5:00000001 r4:ed83d6c0
[   20.129706] [<80585378>] (soc_dapm_dai_stream_event.isra.42) from [<80587e28>] (snd_soc_dapm_stream_event+0x78/0xa0)
[   20.140264]  r5:ee2ee62c r4:00000001
[   20.143918] [<80587db0>] (snd_soc_dapm_stream_event) from [<8058957c>] (soc_pcm_prepare+0x138/0x21c)
[   20.153058]  r8:ed8d9480 r7:00000000 r6:ed9b0e00 r5:00000001 r4:ee2ee62c r3:00000000
...

This patch is to not probe the dummy component in soc_probe_component. Then
there is no widget created for dummy DAI, and also don't need to check the
dummy dai in dapm_connect_dai_link_widgets().

Signed-off-by: Shengjiu Wang <shengjiu.wang at freescale.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/soc-core.c | 2 +-
 sound/soc/soc-dapm.c | 5 -----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 3a4a5c0e3f97..6ce621749f8d 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1102,7 +1102,7 @@ static int soc_probe_component(struct snd_soc_card *card,
 	struct snd_soc_dai *dai;
 	int ret;
 
-	if (component->probed)
+	if (!strcmp(component->name, "snd-soc-dummy") || component->probed)
 		return 0;
 
 	component->card = card;
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index aa327c92480c..37ab6b9b6902 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -3820,11 +3820,6 @@ static void dapm_connect_dai_link_widgets(struct snd_soc_card *card,
 	for (i = 0; i < rtd->num_codecs; i++) {
 		struct snd_soc_dai *codec_dai = rtd->codec_dais[i];
 
-		/* there is no point in connecting BE DAI links with dummies */
-		if (snd_soc_dai_is_dummy(codec_dai) ||
-			snd_soc_dai_is_dummy(cpu_dai))
-			continue;
-
 		/* connect BE DAI playback if widgets are valid */
 		if (codec_dai->playback_widget && cpu_dai->playback_widget) {
 			source = cpu_dai->playback_widget;
-- 
2.1.4