ASoC: STI: Fix reader substream pointer set

[ 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@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c
index 0e1c3ee..9735b4c 100644 (file)
--- 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_pcm_substream *substream,
        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 snd_pcm_substream *substream,
                /* Stop the reader */
                uni_reader_stop(reader);
        }
+       reader->substream = NULL;
 }
 
 static const struct snd_soc_dai_ops uni_reader_dai_ops = {