linux-kernel - [PATCH 4.9 039/104] ASoC: STI: Fix reader substream pointer set

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Message-Id: <20171222084612.614312987@linuxfoundation.org>
Date:   Fri, 22 Dec 2017 09:46:05 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnaud Pouliquen <arnaud.pouliquen@...com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 039/104] ASoC: STI: Fix reader substream pointer set

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Arnaud Pouliquen <arnaud.pouliquen@...com>


[ Upstream commit 3c9d3f1bc2defd418b5933bbc928096c9c686d3b ]

reader->substream is used in IRQ handler for error case but is never set.
Set value to pcm substream on DAI startup and clean it on dai shutdown.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/soc/sti/uniperif_reader.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/sound/soc/sti/uniperif_reader.c
+++ b/sound/soc/sti/uniperif_reader.c
@@ -364,6 +364,8 @@ static int uni_reader_startup(struct snd
 	struct uniperif *reader = priv->dai_data.uni;
 	int ret;
 
+	reader->substream = substream;
+
 	if (!UNIPERIF_TYPE_IS_TDM(reader))
 		return 0;
 
@@ -393,6 +395,7 @@ static void uni_reader_shutdown(struct s
 		/* Stop the reader */
 		uni_reader_stop(reader);
 	}
+	reader->substream = NULL;
 }
 
 static const struct snd_soc_dai_ops uni_reader_dai_ops = {