The patch

ASoC: samsung: i2s: Get rid of a static spinlock

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.

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Thanks, Mark

From defc67c6e3638020cc6189d056e0bc187b297068 Mon Sep 17 00:00:00 2001

From: Sylwester Nawrocki s.nawrocki@samsung.com Date: Thu, 14 Feb 2019 10:37:39 +0100 Subject: [PATCH] ASoC: samsung: i2s: Get rid of a static spinlock

This patch makes the spinlock serializing access to the primary/secondary PCM a per I2S controller lock, rather than a global one. There is no need to have a global lock across multiple I2S controllers in the SoC.

Signed-off-by: Sylwester Nawrocki s.nawrocki@samsung.com Acked-by: Krzysztof Kozlowski krzk@kernel.org Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/samsung/i2s.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c index 8f0af4b0f25a..692a752b194c 100644 --- a/sound/soc/samsung/i2s.c +++ b/sound/soc/samsung/i2s.c @@ -88,9 +88,6 @@ struct i2s_dai { struct samsung_i2s_priv *priv; };

-/* Lock for cross i/f checks */ -static DEFINE_SPINLOCK(lock); - struct samsung_i2s_priv { struct platform_device *pdev; struct platform_device *pdev_sec; @@ -101,6 +98,9 @@ struct samsung_i2s_priv { /* Spinlock protecting access to the device's registers */ spinlock_t lock;

+ /* Lock for cross i/f checks */ + spinlock_t pcm_lock; + /* CPU DAIs and their corresponding drivers */ struct i2s_dai *dai; struct snd_soc_dai_driver *dai_drv; @@ -832,7 +832,7 @@ static int i2s_startup(struct snd_pcm_substream *substream,

pm_runtime_get_sync(dai->dev);

- spin_lock_irqsave(&lock, flags); + spin_lock_irqsave(&priv->pcm_lock, flags);

i2s->mode |= DAI_OPENED;

@@ -844,7 +844,7 @@ static int i2s_startup(struct snd_pcm_substream *substream, if (!any_active(i2s) && (priv->quirks & QUIRK_NEED_RSTCLR)) writel(CON_RSTCLR, i2s->priv->addr + I2SCON);

- spin_unlock_irqrestore(&lock, flags); + spin_unlock_irqrestore(&priv->pcm_lock, flags);

return 0; } @@ -852,11 +852,12 @@ static int i2s_startup(struct snd_pcm_substream *substream, static void i2s_shutdown(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { + struct samsung_i2s_priv *priv = snd_soc_dai_get_drvdata(dai); struct i2s_dai *i2s = to_info(dai); struct i2s_dai *other = get_other_dai(i2s); unsigned long flags;

- spin_lock_irqsave(&lock, flags); + spin_lock_irqsave(&priv->pcm_lock, flags);

i2s->mode &= ~DAI_OPENED; i2s->mode &= ~DAI_MANAGER; @@ -868,7 +869,7 @@ static void i2s_shutdown(struct snd_pcm_substream *substream, i2s->rfs = 0; i2s->bfs = 0;

- spin_unlock_irqrestore(&lock, flags); + spin_unlock_irqrestore(&priv->pcm_lock, flags);

pm_runtime_put(dai->dev); } @@ -1406,6 +1407,7 @@ static int samsung_i2s_probe(struct platform_device *pdev) pri_dai = &priv->dai[SAMSUNG_I2S_ID_PRIMARY - 1];

spin_lock_init(&priv->lock); + spin_lock_init(&priv->pcm_lock);

if (!np) { if (i2s_pdata == NULL) {