[PATCH] ASoC: dmaengine: Improve of_node test in dmaengine_pcm_request_chan_of()

[Sylwester Nawrocki]

Currently when of_node of the "PCM" device is null
dmaengine_pcm_request_chan_of() function will bail out, including cases
when custom DMA device is intended to be used.  To have the channels
properly requested when custom DMA device is provided extend the of_node
test to also consider dma_dev->of_node.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 sound/soc/soc-generic-dmaengine-pcm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 30e791a53352..6d7638c1233d 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -415,7 +415,8 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
 
 	if ((pcm->flags & (SND_DMAENGINE_PCM_FLAG_NO_DT |
 			   SND_DMAENGINE_PCM_FLAG_CUSTOM_CHANNEL_NAME)) ||
-	    !dev->of_node)
+	     (!dev->of_node && !(config && config->dma_dev &&
+				config->dma_dev->of_node)))
 		return 0;
 
 	if (config && config->dma_dev) {
-- 
2.20.1