iio: imu: adis: create an unlocked version of adis_check_status()

This one also gets re-used in certain operations, so it makes sense to
have an unlocked version of this to group it with other
reads/writes/operations to have a single lock for the whole state change.

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 5cf7a15be6ee163e528ee1fd9c8ba3d6a764ac6e..b63d6e6f54157a50f42f6e6998ca01c39375c6c1 100644 (file)
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -277,18 +277,18 @@ out_unlock:
 EXPORT_SYMBOL(adis_enable_irq);
 
 /**
- * adis_check_status() - Check the device for error conditions
+ * __adis_check_status() - Check the device for error conditions (unlocked)
  * @adis: The adis device
  *
  * Returns 0 on success, a negative error code otherwise
  */
-int adis_check_status(struct adis *adis)
+int __adis_check_status(struct adis *adis)
 {
        uint16_t status;
        int ret;
        int i;
 
-       ret = adis_read_reg_16(adis, adis->data->diag_stat_reg, &status);
+       ret = __adis_read_reg_16(adis, adis->data->diag_stat_reg, &status);
        if (ret)
                return ret;
 
@@ -306,7 +306,7 @@ int adis_check_status(struct adis *adis)
 
        return -EIO;
 }
-EXPORT_SYMBOL_GPL(adis_check_status);
+EXPORT_SYMBOL_GPL(__adis_check_status);
 
 /**
  * adis_reset() - Reset the device

diff --git a/include/linux/iio/imu/adis.h b/include/linux/iio/imu/adis.h
index 38ebe41092e167ebbae2a4411dceae0bd3ee0d82..db759957e1c16c950e4cfe935b0441338ab333a9 100644 (file)
--- a/include/linux/iio/imu/adis.h
+++ b/include/linux/iio/imu/adis.h
@@ -267,7 +267,18 @@ static inline int adis_read_reg_32(struct adis *adis, unsigned int reg,
 }
 
 int adis_enable_irq(struct adis *adis, bool enable);
-int adis_check_status(struct adis *adis);
+int __adis_check_status(struct adis *adis);
+
+static inline int adis_check_status(struct adis *adis)
+{
+       int ret;
+
+       mutex_lock(&adis->state_lock);
+       ret = __adis_check_status(adis);
+       mutex_unlock(&adis->state_lock);
+
+       return ret;
+}
 
 int adis_initial_startup(struct adis *adis);