From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 19 Mar 2015 04:13:47 +0000 (+0000)
Subject: ASoC: rsnd: no more SSI restart when unusual situation
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=044930b4a69a6c0645b6199bec4f870e0b6e77f4;p=linux-beck.git

ASoC: rsnd: no more SSI restart when unusual situation

It will be SSI interrupt endless loop f unusual situation happen.
This patch adds restart limit for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index fea4aa53918a..060d3d205250 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -416,11 +416,14 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data)
 		/*
 		 * restart SSI
 		 */
-		rsnd_ssi_stop(mod, priv);
-		rsnd_ssi_start(mod, priv);
-
 		dev_dbg(dev, "%s[%d] restart\n",
 			rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+		rsnd_ssi_stop(mod, priv);
+		if (ssi->err < 1024)
+			rsnd_ssi_start(mod, priv);
+		else
+			dev_warn(dev, "no more SSI restart\n");
 	}
 
 	rsnd_ssi_record_error(ssi, status);