ASoC: fsl-ssi: remove unnecessary spinlock

The baudclock_locked variable is only used in functions which
are serialized anyway from the core. No need to have a lock
around the variable, so remove it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Tested-By: Michael Grzeschik <mgr@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 4 insertions, 17 deletions

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 930095b1b72a..b3033d9108b2 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -163,7 +163,6 @@ struct fsl_ssi_private {
         bool baudclk_locked;
         bool use_dual_fifo;
         u8 i2s_mode;
-        spinlock_t baudclk_lock;
         struct clk *baudclk;
         struct clk *clk;
         unsigned int bitclk_freq;
@@ -495,13 +494,9 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream,
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct fsl_ssi_private *ssi_private =
                 snd_soc_dai_get_drvdata(rtd->cpu_dai);
-        unsigned long flags;
 
-        if (!dai->active && !fsl_ssi_is_ac97(ssi_private)) {
-                spin_lock_irqsave(&ssi_private->baudclk_lock, flags);
+        if (!dai->active && !fsl_ssi_is_ac97(ssi_private))
                 ssi_private->baudclk_locked = false;
-                spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags);
-        }
 
         /* When using dual fifo mode, it is safer to ensure an even period
          * size. If appearing to an odd number while DMA always starts its
@@ -532,7 +527,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
         struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
         int synchronous = ssi_private->cpu_dai_drv.symmetric_rates, ret;
         u32 pm = 999, div2, psr, stccr, mask, afreq, factor, i;
-        unsigned long flags, clkrate, baudrate, tmprate;
+        unsigned long clkrate, baudrate, tmprate;
         u64 sub, savesub = 100000;
         unsigned int freq;
 
@@ -603,18 +598,14 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
         else
                 write_ssi_mask(&ssi->srccr, mask, stccr);
 
-        spin_lock_irqsave(&ssi_private->baudclk_lock, flags);
         if (!ssi_private->baudclk_locked) {
                 ret = clk_set_rate(ssi_private->baudclk, baudrate);
                 if (ret) {
-                        spin_unlock_irqrestore(&ssi_private->baudclk_lock,
-                                        flags);
                         dev_err(cpu_dai->dev, "failed to set baudclk rate\n");
                         return -EINVAL;
                 }
                 ssi_private->baudclk_locked = true;
         }
-        spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags);
 
         return 0;
 }
@@ -899,7 +890,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai);
         struct ccsr_ssi __iomem *ssi = ssi_private->ssi;
-        unsigned long flags;
 
         switch (cmd) {
         case SNDRV_PCM_TRIGGER_START:
@@ -920,11 +910,9 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd,
                         fsl_ssi_rx_config(ssi_private, false);
 
                 if (!fsl_ssi_is_ac97(ssi_private) && (read_ssi(&ssi->scr) &
-                                        (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0) {
-                        spin_lock_irqsave(&ssi_private->baudclk_lock, flags);
+                                        (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0)
                         ssi_private->baudclk_locked = false;
-                        spin_unlock_irqrestore(&ssi_private->baudclk_lock, flags);
-                }
+
                 break;
 
         default:
@@ -1257,7 +1245,6 @@ static int fsl_ssi_probe(struct platform_device *pdev)
                 ssi_private->fifo_depth = 8;
 
         ssi_private->baudclk_locked = false;
-        spin_lock_init(&ssi_private->baudclk_lock);
 
         dev_set_drvdata(&pdev->dev, ssi_private);