[alsa-devel] Applied "ASoC: stm32: i2s: fix stream count management" to the asoc tree

[Mark Brown]

The patch

   ASoC: stm32: i2s: fix stream count management

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From ebf629d502cf7aa138b86f36dc016faf6c8e39e3 Mon Sep 17 00:00:00 2001
From: Olivier Moysan <olivier.moysan at st.com>
Date: Tue, 26 Feb 2019 14:51:06 +0100
Subject: [PATCH] ASoC: stm32: i2s: fix stream count management

Move counter handling to trigger start section
to manage multiple start/stop events.

Signed-off-by: Olivier Moysan <olivier.moysan at st.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/stm/stm32_i2s.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index 7d4c67433916..7f56d7b51ba3 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -554,10 +554,6 @@ static int stm32_i2s_startup(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
-	spin_lock(&i2s->lock_fd);
-	i2s->refcount++;
-	spin_unlock(&i2s->lock_fd);
-
 	return regmap_write_bits(i2s->regmap, STM32_I2S_IFCR_REG,
 				 I2S_IFCR_MASK, I2S_IFCR_MASK);
 }
@@ -613,18 +609,19 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 		regmap_write_bits(i2s->regmap, STM32_I2S_IFCR_REG,
 				  I2S_IFCR_MASK, I2S_IFCR_MASK);
 
+		spin_lock(&i2s->lock_fd);
+		i2s->refcount++;
 		if (playback_flg) {
 			ier = I2S_IER_UDRIE;
 		} else {
 			ier = I2S_IER_OVRIE;
 
-			spin_lock(&i2s->lock_fd);
 			if (i2s->refcount == 1)
 				/* dummy write to trigger capture */
 				regmap_write(i2s->regmap,
 					     STM32_I2S_TXDR_REG, 0);
-			spin_unlock(&i2s->lock_fd);
 		}
+		spin_unlock(&i2s->lock_fd);
 
 		if (STM32_I2S_IS_SLAVE(i2s))
 			ier |= I2S_IER_TIFREIE;
@@ -649,7 +646,6 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 			spin_unlock(&i2s->lock_fd);
 			break;
 		}
-		spin_unlock(&i2s->lock_fd);
 
 		dev_dbg(cpu_dai->dev, "stop I2S\n");
 
@@ -657,8 +653,10 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 					 I2S_CR1_SPE, 0);
 		if (ret < 0) {
 			dev_err(cpu_dai->dev, "Error %d disabling I2S\n", ret);
+			spin_unlock(&i2s->lock_fd);
 			return ret;
 		}
+		spin_unlock(&i2s->lock_fd);
 
 		cfg1_mask = I2S_CFG1_RXDMAEN | I2S_CFG1_TXDMAEN;
 		regmap_update_bits(i2s->regmap, STM32_I2S_CFG1_REG,
-- 
2.20.1