linux-kernel - [PATCH AUTOSEL for 4.14 050/135] ASoC: rsnd: rsnd_ssi_run_mods() needs to care ssi_parent

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Message-ID: <20171207154513.4154-50-alexander.levin@verizon.com>
Date:   Thu, 7 Dec 2017 15:45:42 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        Mark Brown <broonie@...nel.org>, alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.14 050/135] ASoC: rsnd: rsnd_ssi_run_mods()
 needs to care ssi_parent_mod

From: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>

[ Upstream commit 21781e87881f9c420871b1d1f3f29d4cd7bffb10 ]

SSI parent mod might be NULL. ssi_parent_mod() needs to care
about it. Otherwise, it uses negative shift.
This patch fixes it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 sound/soc/sh/rcar/ssi.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index fffc07e72627..2aef7c00cca1 100644
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -198,10 +198,15 @@ static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io)
 {
 	struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
 	struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io);
+	u32 mods;
 
-	return rsnd_ssi_multi_slaves_runtime(io) |
-		1 << rsnd_mod_id(ssi_mod) |
-		1 << rsnd_mod_id(ssi_parent_mod);
+	mods = rsnd_ssi_multi_slaves_runtime(io) |
+		1 << rsnd_mod_id(ssi_mod);
+
+	if (ssi_parent_mod)
+		mods |= 1 << rsnd_mod_id(ssi_parent_mod);
+
+	return mods;
 }
 
 u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io)
-- 
2.11.0