ASoC: rsnd: don't call free_irq() on Parent SSI

commit 1f8754d4 upstream.

If SSI uses shared pin, some SSI will be used as parent SSI.
Then, normal SSI's remove and Parent SSI's remove
(these are same SSI) will be called when unbind or remove timing.
In this case, free_irq() will be called twice.
This patch solve this issue.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Reported-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: thongsyho <thong.ho.px@rvc.renesas.com>
Signed-off-by: Nhan Nguyen <nhan.nguyen.yb@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

sound/soc/sh/rcar/rsnd.h

@@ -235,6 +235,7 @@ enum rsnd_mod_type {
 	RSND_MOD_MIX,
 	RSND_MOD_CTU,
 	RSND_MOD_SRC,
+	RSND_MOD_SSIP, /* SSI parent */
 	RSND_MOD_SSI,
 	RSND_MOD_MAX,
 };
@@ -365,6 +366,7 @@ struct rsnd_dai_stream {
 };
 #define rsnd_io_to_mod(io, i)	((i) < RSND_MOD_MAX ? (io)->mod[(i)] : NULL)
 #define rsnd_io_to_mod_ssi(io)	rsnd_io_to_mod((io), RSND_MOD_SSI)
+#define rsnd_io_to_mod_ssip(io) rsnd_io_to_mod((io), RSND_MOD_SSIP)
 #define rsnd_io_to_mod_src(io)	rsnd_io_to_mod((io), RSND_MOD_SRC)
 #define rsnd_io_to_mod_ctu(io)	rsnd_io_to_mod((io), RSND_MOD_CTU)
 #define rsnd_io_to_mod_mix(io)	rsnd_io_to_mod((io), RSND_MOD_MIX)

sound/soc/sh/rcar/ssi.c

@@ -550,11 +550,16 @@ static int rsnd_ssi_dma_remove(struct rsnd_mod *mod,
 			       struct rsnd_priv *priv)
 {
 	struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+	struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
 	struct device *dev = rsnd_priv_to_dev(priv);
 	int irq = ssi->info->irq;
 
 	rsnd_dma_quit(io, rsnd_mod_to_dma(mod));
 
+	/* Do nothing for SSI parent mod */
+	if (ssi_parent_mod == mod)
+		return 0;
+
 	/* PIO will request IRQ again */
 	devm_free_irq(dev, irq, mod);