diff options
author | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-01-28 18:05:30 +0300 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2024-02-17 19:16:10 +0300 |
commit | eabc6b08476f18de5e0d7fc02aa92f4896f2fc63 (patch) | |
tree | 39a6e352c948b6476d5df06705bedb65f5ac5ad3 /drivers/iio/accel | |
parent | 366328e5ac47a763d77b9dd85172d3eb3735568e (diff) | |
download | linux-eabc6b08476f18de5e0d7fc02aa92f4896f2fc63.tar.xz |
iio: accel: adxl367: Use automated cleanup for locks and iio direct mode.
Switching to the iio_device_claim_direct_scoped() for state
and to guard() based unlocking of mutexes simplifies error handling
by allowing direct returns when an error is encountered.
Reviewed-by: Nuno Sa <nuno.a@analog.com>
Link: https://lore.kernel.org/r/20240128150537.44592-4-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/accel')
-rw-r--r-- | drivers/iio/accel/adxl367.c | 297 |
1 files changed, 118 insertions, 179 deletions
diff --git a/drivers/iio/accel/adxl367.c b/drivers/iio/accel/adxl367.c index 90b7ae6d42b7..834ee6d63947 100644 --- a/drivers/iio/accel/adxl367.c +++ b/drivers/iio/accel/adxl367.c @@ -339,22 +339,17 @@ static int adxl367_set_act_threshold(struct adxl367_state *st, { int ret; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); ret = adxl367_set_measure_en(st, false); if (ret) - goto out; + return ret; ret = _adxl367_set_act_threshold(st, act, threshold); if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); - -out: - mutex_unlock(&st->lock); + return ret; - return ret; + return adxl367_set_measure_en(st, true); } static int adxl367_set_act_proc_mode(struct adxl367_state *st, @@ -482,51 +477,45 @@ static int adxl367_set_fifo_watermark(struct adxl367_state *st, static int adxl367_set_range(struct iio_dev *indio_dev, enum adxl367_range range) { - struct adxl367_state *st = iio_priv(indio_dev); - int ret; + iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { + struct adxl367_state *st = iio_priv(indio_dev); + int ret; - ret = iio_device_claim_direct_mode(indio_dev); - if (ret) - return ret; - - mutex_lock(&st->lock); - - ret = adxl367_set_measure_en(st, false); - if (ret) - goto out; + guard(mutex)(&st->lock); - ret = regmap_update_bits(st->regmap, ADXL367_REG_FILTER_CTL, - ADXL367_FILTER_CTL_RANGE_MASK, - FIELD_PREP(ADXL367_FILTER_CTL_RANGE_MASK, - range)); - if (ret) - goto out; + ret = adxl367_set_measure_en(st, false); + if (ret) + return ret; - adxl367_scale_act_thresholds(st, st->range, range); + ret = regmap_update_bits(st->regmap, ADXL367_REG_FILTER_CTL, + ADXL367_FILTER_CTL_RANGE_MASK, + FIELD_PREP(ADXL367_FILTER_CTL_RANGE_MASK, + range)); + if (ret) + return ret; - /* Activity thresholds depend on range */ - ret = _adxl367_set_act_threshold(st, ADXL367_ACTIVITY, - st->act_threshold); - if (ret) - goto out; + adxl367_scale_act_thresholds(st, st->range, range); - ret = _adxl367_set_act_threshold(st, ADXL367_INACTIVITY, - st->inact_threshold); - if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); - if (ret) - goto out; + /* Activity thresholds depend on range */ + ret = _adxl367_set_act_threshold(st, ADXL367_ACTIVITY, + st->act_threshold); + if (ret) + return ret; - st->range = range; + ret = _adxl367_set_act_threshold(st, ADXL367_INACTIVITY, + st->inact_threshold); + if (ret) + return ret; -out: - mutex_unlock(&st->lock); + ret = adxl367_set_measure_en(st, true); + if (ret) + return ret; - iio_device_release_direct_mode(indio_dev); + st->range = range; - return ret; + return 0; + } + unreachable(); } static int adxl367_time_ms_to_samples(struct adxl367_state *st, unsigned int ms) @@ -587,11 +576,11 @@ static int adxl367_set_act_time_ms(struct adxl367_state *st, { int ret; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); ret = adxl367_set_measure_en(st, false); if (ret) - goto out; + return ret; if (act == ADXL367_ACTIVITY) ret = _adxl367_set_act_time_ms(st, ms); @@ -599,14 +588,9 @@ static int adxl367_set_act_time_ms(struct adxl367_state *st, ret = _adxl367_set_inact_time_ms(st, ms); if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); - -out: - mutex_unlock(&st->lock); + return ret; - return ret; + return adxl367_set_measure_en(st, true); } static int _adxl367_set_odr(struct adxl367_state *st, enum adxl367_odr odr) @@ -636,31 +620,23 @@ static int _adxl367_set_odr(struct adxl367_state *st, enum adxl367_odr odr) static int adxl367_set_odr(struct iio_dev *indio_dev, enum adxl367_odr odr) { - struct adxl367_state *st = iio_priv(indio_dev); - int ret; + iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { + struct adxl367_state *st = iio_priv(indio_dev);; + int ret; - ret = iio_device_claim_direct_mode(indio_dev); - if (ret) - return ret; + guard(mutex)(&st->lock); - mutex_lock(&st->lock); - - ret = adxl367_set_measure_en(st, false); - if (ret) - goto out; - - ret = _adxl367_set_odr(st, odr); - if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); - -out: - mutex_unlock(&st->lock); + ret = adxl367_set_measure_en(st, false); + if (ret) + return ret; - iio_device_release_direct_mode(indio_dev); + ret = _adxl367_set_odr(st, odr); + if (ret) + return ret; - return ret; + return adxl367_set_measure_en(st, true); + } + unreachable(); } static int adxl367_set_temp_adc_en(struct adxl367_state *st, unsigned int reg, @@ -749,36 +725,32 @@ static int adxl367_read_sample(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val) { - struct adxl367_state *st = iio_priv(indio_dev); - u16 sample; - int ret; + iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { + struct adxl367_state *st = iio_priv(indio_dev); + u16 sample; + int ret; - ret = iio_device_claim_direct_mode(indio_dev); - if (ret) - return ret; + guard(mutex)(&st->lock); - mutex_lock(&st->lock); - - ret = adxl367_set_temp_adc_reg_en(st, chan->address, true); - if (ret) - goto out; - - ret = regmap_bulk_read(st->regmap, chan->address, &st->sample_buf, - sizeof(st->sample_buf)); - if (ret) - goto out; - - sample = FIELD_GET(ADXL367_DATA_MASK, be16_to_cpu(st->sample_buf)); - *val = sign_extend32(sample, chan->scan_type.realbits - 1); + ret = adxl367_set_temp_adc_reg_en(st, chan->address, true); + if (ret) + return ret; - ret = adxl367_set_temp_adc_reg_en(st, chan->address, false); + ret = regmap_bulk_read(st->regmap, chan->address, &st->sample_buf, + sizeof(st->sample_buf)); + if (ret) + return ret; -out: - mutex_unlock(&st->lock); + sample = FIELD_GET(ADXL367_DATA_MASK, be16_to_cpu(st->sample_buf)); + *val = sign_extend32(sample, chan->scan_type.realbits - 1); - iio_device_release_direct_mode(indio_dev); + ret = adxl367_set_temp_adc_reg_en(st, chan->address, false); + if (ret) + return ret; - return ret ?: IIO_VAL_INT; + return IIO_VAL_INT; + } + unreachable(); } static int adxl367_get_status(struct adxl367_state *st, u8 *status, @@ -886,12 +858,12 @@ static int adxl367_read_raw(struct iio_dev *indio_dev, return adxl367_read_sample(indio_dev, chan, val); case IIO_CHAN_INFO_SCALE: switch (chan->type) { - case IIO_ACCEL: - mutex_lock(&st->lock); + case IIO_ACCEL: { + guard(mutex)(&st->lock); *val = adxl367_range_scale_tbl[st->range][0]; *val2 = adxl367_range_scale_tbl[st->range][1]; - mutex_unlock(&st->lock); return IIO_VAL_INT_PLUS_NANO; + } case IIO_TEMP: *val = 1000; *val2 = ADXL367_TEMP_PER_C; @@ -914,12 +886,12 @@ static int adxl367_read_raw(struct iio_dev *indio_dev, default: return -EINVAL; } - case IIO_CHAN_INFO_SAMP_FREQ: - mutex_lock(&st->lock); + case IIO_CHAN_INFO_SAMP_FREQ: { + guard(mutex)(&st->lock); *val = adxl367_samp_freq_tbl[st->odr][0]; *val2 = adxl367_samp_freq_tbl[st->odr][1]; - mutex_unlock(&st->lock); return IIO_VAL_INT_PLUS_MICRO; + } default: return -EINVAL; } @@ -1004,18 +976,15 @@ static int adxl367_read_event_value(struct iio_dev *indio_dev, { struct adxl367_state *st = iio_priv(indio_dev); + guard(mutex)(&st->lock); switch (info) { case IIO_EV_INFO_VALUE: { switch (dir) { case IIO_EV_DIR_RISING: - mutex_lock(&st->lock); *val = st->act_threshold; - mutex_unlock(&st->lock); return IIO_VAL_INT; case IIO_EV_DIR_FALLING: - mutex_lock(&st->lock); *val = st->inact_threshold; - mutex_unlock(&st->lock); return IIO_VAL_INT; default: return -EINVAL; @@ -1024,15 +993,11 @@ static int adxl367_read_event_value(struct iio_dev *indio_dev, case IIO_EV_INFO_PERIOD: switch (dir) { case IIO_EV_DIR_RISING: - mutex_lock(&st->lock); *val = st->act_time_ms; - mutex_unlock(&st->lock); *val2 = 1000; return IIO_VAL_FRACTIONAL; case IIO_EV_DIR_FALLING: - mutex_lock(&st->lock); *val = st->inact_time_ms; - mutex_unlock(&st->lock); *val2 = 1000; return IIO_VAL_FRACTIONAL; default: @@ -1110,9 +1075,7 @@ static int adxl367_write_event_config(struct iio_dev *indio_dev, enum iio_event_direction dir, int state) { - struct adxl367_state *st = iio_priv(indio_dev); enum adxl367_activity_type act; - int ret; switch (dir) { case IIO_EV_DIR_RISING: @@ -1125,33 +1088,28 @@ static int adxl367_write_event_config(struct iio_dev *indio_dev, return -EINVAL; } - ret = iio_device_claim_direct_mode(indio_dev); - if (ret) - return ret; - - mutex_lock(&st->lock); + iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { + struct adxl367_state *st = iio_priv(indio_dev); + int ret; - ret = adxl367_set_measure_en(st, false); - if (ret) - goto out; + guard(mutex)(&st->lock); - ret = adxl367_set_act_interrupt_en(st, act, state); - if (ret) - goto out; - - ret = adxl367_set_act_en(st, act, state ? ADCL367_ACT_REF_ENABLED - : ADXL367_ACT_DISABLED); - if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); + ret = adxl367_set_measure_en(st, false); + if (ret) + return ret; -out: - mutex_unlock(&st->lock); + ret = adxl367_set_act_interrupt_en(st, act, state); + if (ret) + return ret; - iio_device_release_direct_mode(indio_dev); + ret = adxl367_set_act_en(st, act, state ? ADCL367_ACT_REF_ENABLED + : ADXL367_ACT_DISABLED); + if (ret) + return ret; - return ret; + return adxl367_set_measure_en(st, true); + } + unreachable(); } static ssize_t adxl367_get_fifo_enabled(struct device *dev, @@ -1176,9 +1134,8 @@ static ssize_t adxl367_get_fifo_watermark(struct device *dev, struct adxl367_state *st = iio_priv(dev_to_iio_dev(dev)); unsigned int fifo_watermark; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); fifo_watermark = st->fifo_watermark; - mutex_unlock(&st->lock); return sysfs_emit(buf, "%d\n", fifo_watermark); } @@ -1207,22 +1164,17 @@ static int adxl367_set_watermark(struct iio_dev *indio_dev, unsigned int val) if (val > ADXL367_FIFO_MAX_WATERMARK) return -EINVAL; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); ret = adxl367_set_measure_en(st, false); if (ret) - goto out; + return ret; ret = adxl367_set_fifo_watermark(st, val); if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); - -out: - mutex_unlock(&st->lock); + return ret; - return ret; + return adxl367_set_measure_en(st, true); } static bool adxl367_find_mask_fifo_format(const unsigned long *scan_mask, @@ -1253,27 +1205,24 @@ static int adxl367_update_scan_mode(struct iio_dev *indio_dev, if (!adxl367_find_mask_fifo_format(active_scan_mask, &fifo_format)) return -EINVAL; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); ret = adxl367_set_measure_en(st, false); if (ret) - goto out; + return ret; ret = adxl367_set_fifo_format(st, fifo_format); if (ret) - goto out; + return ret; ret = adxl367_set_measure_en(st, true); if (ret) - goto out; + return ret; st->fifo_set_size = bitmap_weight(active_scan_mask, indio_dev->masklength); -out: - mutex_unlock(&st->lock); - - return ret; + return 0; } static int adxl367_buffer_postenable(struct iio_dev *indio_dev) @@ -1281,31 +1230,26 @@ static int adxl367_buffer_postenable(struct iio_dev *indio_dev) struct adxl367_state *st = iio_priv(indio_dev); int ret; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); ret = adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask, true); if (ret) - goto out; + return ret; ret = adxl367_set_measure_en(st, false); if (ret) - goto out; + return ret; ret = adxl367_set_fifo_watermark_interrupt_en(st, true); if (ret) - goto out; + return ret; ret = adxl367_set_fifo_mode(st, ADXL367_FIFO_MODE_STREAM); if (ret) - goto out; - - ret = adxl367_set_measure_en(st, true); - -out: - mutex_unlock(&st->lock); + return ret; - return ret; + return adxl367_set_measure_en(st, true); } static int adxl367_buffer_predisable(struct iio_dev *indio_dev) @@ -1313,31 +1257,26 @@ static int adxl367_buffer_predisable(struct iio_dev *indio_dev) struct adxl367_state *st = iio_priv(indio_dev); int ret; - mutex_lock(&st->lock); + guard(mutex)(&st->lock); ret = adxl367_set_measure_en(st, false); if (ret) - goto out; + return ret; ret = adxl367_set_fifo_mode(st, ADXL367_FIFO_MODE_DISABLED); if (ret) - goto out; + return ret; ret = adxl367_set_fifo_watermark_interrupt_en(st, false); if (ret) - goto out; + return ret; ret = adxl367_set_measure_en(st, true); if (ret) - goto out; - - ret = adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask, - false); - -out: - mutex_unlock(&st->lock); + return ret; - return ret; + return adxl367_set_temp_adc_mask_en(st, indio_dev->active_scan_mask, + false); } static const struct iio_buffer_setup_ops adxl367_buffer_ops = { |