From: Alexandru Ardelean <alexandru.ardelean@analog.com>
Date: Fri, 22 Nov 2019 13:24:17 +0000 (+0200)
Subject: iio: imu: adis: group single conversion under a single state lock
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c5485a5d6a5f7d00ca4aba6698526c5ae3f2a1a2;p=linux.git

iio: imu: adis: group single conversion under a single state lock

The single conversion function does a series of reads + writes. This change
extends the use of the state_lock for the entire set of operations.
Previously, indio_dev's mlock was used. This change also removes the use of
this lock.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index 10b8922fd51b6..c53f3ed3cb972 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -404,15 +404,15 @@ int adis_single_conversion(struct iio_dev *indio_dev,
 	unsigned int uval;
 	int ret;
 
-	mutex_lock(&indio_dev->mlock);
+	mutex_lock(&adis->state_lock);
 
-	ret = adis_read_reg(adis, chan->address, &uval,
+	ret = __adis_read_reg(adis, chan->address, &uval,
 			chan->scan_type.storagebits / 8);
 	if (ret)
 		goto err_unlock;
 
 	if (uval & error_mask) {
-		ret = adis_check_status(adis);
+		ret = __adis_check_status(adis);
 		if (ret)
 			goto err_unlock;
 	}
@@ -424,7 +424,7 @@ int adis_single_conversion(struct iio_dev *indio_dev,
 
 	ret = IIO_VAL_INT;
 err_unlock:
-	mutex_unlock(&indio_dev->mlock);
+	mutex_unlock(&adis->state_lock);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(adis_single_conversion);