[PATCH v7 01/17] iio: adc: adi-axi-adc: Initialize state mutex

The AXI ADC register access paths serialize transactions with st->lock,
but probe does not initialize it. Initialize the mutex before registering
the backend.

Fixes: 7ecb8ee5c93b ("iio: adc: adi-axi-adc: support digital interface calibration")
Signed-off-by: Janani Sunil <janani.sunil@analog.com>
---
This patch is already queued in the IIO fixes-togreg branch as commit
040c2514b25b ("iio: adc: adi-axi-adc: Initialize state mutex").
---
 drivers/iio/adc/adi-axi-adc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 589f03618ecf..fc7cc92b35f0 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c

@@ -714,6 +714,10 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
 	if (!st)
 		return -ENOMEM;
 
+	ret = devm_mutex_init(dev, &st->lock);
+	if (ret)
+		return ret;
+
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

-- 
2.43.0