From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
To: Mark Brown <broonie@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>,
alsa-devel@alsa-project.org, Pavel Machek <pavel@denx.de>
Cc: linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
Biju Das <biju.das.jz@bp.renesas.com>,
Prabhakar <prabhakar.csengg@gmail.com>,
Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: [PATCH 2/3] ASoC: sh: rz-ssi: Add rz_ssi_set_substream() helper function
Date: Tue, 25 Jan 2022 13:24:56 +0000 [thread overview]
Message-ID: <20220125132457.14984-3-prabhakar.mahadev-lad.rj@bp.renesas.com> (raw)
In-Reply-To: <20220125132457.14984-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
A copy of substream pointer is stored in priv structure during
rz_ssi_dai_trigger() callback ie in SNDRV_PCM_TRIGGER_START case
and the pointer is assigned to NULL in case of SNDRV_PCM_TRIGGER_STOP.
The driver used the locks only in rz_ssi_stream_is_valid() and assigned
the local substream pointer to NULL in rz_ssi_dai_trigger() callback but
never locked it while making a local copy.
This patch adds the rz_ssi_set_substream() helper function to set the
substream pointer with locks acquired and replaces the instances of
setting the local substream pointer with the rz_ssi_set_substream()
function.
Reported-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
---
sound/soc/sh/rz-ssi.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/sound/soc/sh/rz-ssi.c b/sound/soc/sh/rz-ssi.c
index 2c8775d37f50..1a46c9f3c4e5 100644
--- a/sound/soc/sh/rz-ssi.c
+++ b/sound/soc/sh/rz-ssi.c
@@ -188,6 +188,17 @@ static inline bool rz_ssi_is_dma_enabled(struct rz_ssi_priv *ssi)
return (ssi->playback.dma_ch && (ssi->dma_rt || ssi->capture.dma_ch));
}
+static void rz_ssi_set_substream(struct rz_ssi_stream *strm,
+ struct snd_pcm_substream *substream)
+{
+ struct rz_ssi_priv *ssi = strm->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ssi->lock, flags);
+ strm->substream = substream;
+ spin_unlock_irqrestore(&ssi->lock, flags);
+}
+
static bool rz_ssi_stream_is_valid(struct rz_ssi_priv *ssi,
struct rz_ssi_stream *strm)
{
@@ -206,7 +217,7 @@ static void rz_ssi_stream_init(struct rz_ssi_stream *strm,
{
struct snd_pcm_runtime *runtime = substream->runtime;
- strm->substream = substream;
+ rz_ssi_set_substream(strm, substream);
strm->sample_width = samples_to_bytes(runtime, 1);
strm->dma_buffer_pos = 0;
strm->period_counter = 0;
@@ -224,11 +235,8 @@ static void rz_ssi_stream_quit(struct rz_ssi_priv *ssi,
struct rz_ssi_stream *strm)
{
struct snd_soc_dai *dai = rz_ssi_get_dai(strm->substream);
- unsigned long flags;
- spin_lock_irqsave(&ssi->lock, flags);
- strm->substream = NULL;
- spin_unlock_irqrestore(&ssi->lock, flags);
+ rz_ssi_set_substream(strm, NULL);
if (strm->oerr_num > 0)
dev_info(dai->dev, "overrun = %d\n", strm->oerr_num);
--
2.17.1
next prev parent reply other threads:[~2022-01-25 13:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-25 13:24 [PATCH 0/3] ASoC: sh: rz-ssi: Trivial changes Lad Prabhakar
2022-01-25 13:24 ` [PATCH 1/3] ASoC: sh: rz-ssi: Use a do-while loop in rz_ssi_pio_recv() Lad Prabhakar
2022-01-25 13:24 ` Lad Prabhakar [this message]
2022-01-25 13:24 ` [PATCH 3/3] ASoC: sh: rz-ssi: Remove duplicate macros Lad Prabhakar
2022-01-25 13:48 ` Biju Das
2022-01-25 14:34 ` [PATCH 0/3] ASoC: sh: rz-ssi: Trivial changes Mark Brown
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