From: Sakari Ailus <sakari.ai...@linux.intel.com>

The mutex does not serialise anything in this case but avoids a lockdep
warning from the control framework.

Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
---
 drivers/media/i2c/smiapp/smiapp-core.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/media/i2c/smiapp/smiapp-core.c 
b/drivers/media/i2c/smiapp/smiapp-core.c
index 6db0e8d..346ff5b 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2667,7 +2667,9 @@ static int smiapp_registered(struct v4l2_subdev *subdev)
                pll->flags |= SMIAPP_PLL_FLAG_NO_OP_CLOCKS;
        pll->scale_n = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN];
 
+       mutex_lock(&sensor->mutex);
        rval = smiapp_update_mode(sensor);
+       mutex_unlock(&sensor->mutex);
        if (rval) {
                dev_err(&client->dev, "update mode failed\n");
                goto out_nvm_release;
-- 
1.7.10.4

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