[for,v5.3] ASoC: simple-card-utils: care no Platform for DPCM

Commit Message

Kuninori Morimoto July 10, 2019, 8:01 a.m. UTC

From: Kuninori Morimoto <[e-mail]>

commit 34614739988ad ("ASoC: soc-core: support dai_link with
platforms_num != 1") supports multi Platform, and
commit 9f3eb91753451 ("ASoC: simple-card-utils: consider CPU-Platform
possibility") removed no Platform from simple-card.

Multi Platform is now checking both Platform name/of_node are NULL case.
But in normal case, DPCM be doesn't have Platform.

asoc_simple_canonicalize_platform() try to use CPU of_node
to Platform (This is needed for DMAEngine platform case),
but it still might be NULL at DPCM be.

This patch try to use no Platform after that if Platform of_node
is still NULL. It can't probe without this patch.

Signed-off-by: Kuninori Morimoto <[e-mail]>
---
 sound/soc/generic/simple-card-utils.c | 7 +++++++
 1 file changed, 7 insertions(+)

Patch

diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index ac8678f..556b1a7 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -349,6 +349,13 @@  void asoc_simple_canonicalize_platform(struct snd_soc_dai_link *dai_link)
 	/* Assumes platform == cpu */
 	if (!dai_link->platforms->of_node)
 		dai_link->platforms->of_node = dai_link->cpus->of_node;
+
+	/*
+	 * DPCM BE can be no platform.
+	 * Alloced memory will be waste, but not leak.
+	 */
+	if (!dai_link->platforms->of_node)
+		dai_link->num_platforms = 0;
 }
 EXPORT_SYMBOL_GPL(asoc_simple_canonicalize_platform);