[alsa-devel] [PATCH] ASoC: rsnd: dma.c: spin lock is no longer needed in IRQ handler

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

DMA handler had needed to calculate pointer before, but it doesn't
need now. Thus, we can remove unnecessary spin lock from DMAC handler.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>
---
 sound/soc/sh/rcar/dma.c | 18 ------------------
 1 file changed, 18 deletions(-)

diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
index 4d750bdf..41de234 100644
--- a/sound/soc/sh/rcar/dma.c
+++ b/sound/soc/sh/rcar/dma.c
@@ -71,25 +71,7 @@ struct rsnd_dma_ctrl {
 static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
 				  struct rsnd_dai_stream *io)
 {
-	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
-	bool elapsed = false;
-	unsigned long flags;
-
-	/*
-	 * Renesas sound Gen1 needs 1 DMAC,
-	 * Gen2 needs 2 DMAC.
-	 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
-	 * But, Audio-DMAC-peri-peri doesn't have interrupt,
-	 * and this driver is assuming that here.
-	 */
-	spin_lock_irqsave(&priv->lock, flags);
-
 	if (rsnd_io_is_working(io))
-		elapsed = true;
-
-	spin_unlock_irqrestore(&priv->lock, flags);
-
-	if (elapsed)
 		rsnd_dai_period_elapsed(io);
 }
 
-- 
1.9.1