| Message ID | 20220327154005.806049-1-ztong0001@gmail.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v3] iio:imu:bmi160: disable regulator in error path | expand |
On Sun, 27 Mar 2022 08:40:05 -0700 Tong Zhang <ztong0001@gmail.com> wrote: > 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> oops. Raced with you ;) Anyhow, I added the tag, so no problem. Jonathan > --- > v2: also disable accel when gyro fail to enable > v3: add tag > drivers/iio/imu/bmi160/bmi160_core.c | 20 ++++++++++++++------ > 1 file changed, 14 insertions(+), 6 deletions(-) > > diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c > index 824b5124a5f5..01336105792e 100644 > --- 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,
On Sun, Mar 27, 2022 at 8:46 AM Jonathan Cameron <jic23@kernel.org> wrote: > > On Sun, 27 Mar 2022 08:40:05 -0700 > Tong Zhang <ztong0001@gmail.com> wrote: > > > 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> > oops. Raced with you ;) > > Anyhow, I added the tag, so no problem. > > Jonathan No problem. Have a nice weekend!:-) - Tong > > > --- > > v2: also disable accel when gyro fail to enable > > v3: add tag > > drivers/iio/imu/bmi160/bmi160_core.c | 20 ++++++++++++++------ > > 1 file changed, 14 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c > > index 824b5124a5f5..01336105792e 100644 > > --- 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, >
On Sun, 27 Mar 2022 16:53:36 +0100 Jonathan Cameron <jic23@kernel.org> wrote: > On Sun, 27 Mar 2022 08:40:05 -0700 > Tong Zhang <ztong0001@gmail.com> wrote: > > > 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> > oops. Raced with you ;) > > Anyhow, I added the tag, so no problem. on closer inspection b4 was clever and picked v3 up anyway. J > > Jonathan > > > --- > > v2: also disable accel when gyro fail to enable > > v3: add tag > > drivers/iio/imu/bmi160/bmi160_core.c | 20 ++++++++++++++------ > > 1 file changed, 14 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c > > index 824b5124a5f5..01336105792e 100644 > > --- 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, >
diff --git a/drivers/iio/imu/bmi160/bmi160_core.c b/drivers/iio/imu/bmi160/bmi160_core.c index 824b5124a5f5..01336105792e 100644 --- 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,
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> --- v2: also disable accel when gyro fail to enable v3: add tag drivers/iio/imu/bmi160/bmi160_core.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-)