iio:imu:bmi160: disable regulator in error path

[ Upstream commit d926054d5565d3cfa2c7c3f7a48e79bcc10453ed ]

Regulator should be disabled in error path as mentioned in _regulator_put().
Also disable accel if gyro cannot be enabled.

[   16.233604] WARNING: CPU: 0 PID: 2177 at drivers/regulator/core.c:2257 _regulator_put
[   16.240453] Call Trace:
[   16.240572]  <TASK>
[   16.240676]  regulator_put+0x26/0x40
[   16.240853]  regulator_bulk_free+0x26/0x50
[   16.241050]  release_nodes+0x3f/0x70
[   16.241225]  devres_release_group+0x147/0x1c0
[   16.241441]  ? bmi160_core_probe+0x175/0x3a0 [bmi160_core]

Fixes: 5dea3fb066f0 ("iio: imu: bmi160: added regulator support")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Link: https://lore.kernel.org/r/20220327154005.806049-1-ztong0001@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c
index 824b5124a5f55779a29284576496d9a84f181526..01336105792ee25b4c58f72e16879c495d4981ee 100644 (file)
--- a/drivers/iio/imu/bmi160/bmi160_core.c
+++ b/drivers/iio/imu/bmi160/bmi160_core.c
@@ -730,7 +730,7 @@ static int bmi160_chip_init(struct bmi160_data *data, bool use_spi)
 
        ret = regmap_write(data->regmap, BMI160_REG_CMD, BMI160_CMD_SOFTRESET);
        if (ret)
-               return ret;
+               goto disable_regulator;
 
        usleep_range(BMI160_SOFTRESET_USLEEP, BMI160_SOFTRESET_USLEEP + 1);
 
@@ -741,29 +741,37 @@ static int bmi160_chip_init(struct bmi160_data *data, bool use_spi)
        if (use_spi) {
                ret = regmap_read(data->regmap, BMI160_REG_DUMMY, &val);
                if (ret)
-                       return ret;
+                       goto disable_regulator;
        }
 
        ret = regmap_read(data->regmap, BMI160_REG_CHIP_ID, &val);
        if (ret) {
                dev_err(dev, "Error reading chip id\n");
-               return ret;
+               goto disable_regulator;
        }
        if (val != BMI160_CHIP_ID_VAL) {
                dev_err(dev, "Wrong chip id, got %x expected %x\n",
                        val, BMI160_CHIP_ID_VAL);
-               return -ENODEV;
+               ret = -ENODEV;
+               goto disable_regulator;
        }
 
        ret = bmi160_set_mode(data, BMI160_ACCEL, true);
        if (ret)
-               return ret;
+               goto disable_regulator;
 
        ret = bmi160_set_mode(data, BMI160_GYRO, true);
        if (ret)
-               return ret;
+               goto disable_accel;
 
        return 0;
+
+disable_accel:
+       bmi160_set_mode(data, BMI160_ACCEL, false);
+
+disable_regulator:
+       regulator_bulk_disable(ARRAY_SIZE(data->supplies), data->supplies);
+       return ret;
 }
 
 static int bmi160_data_rdy_trigger_set_state(struct iio_trigger *trig,