diff options
Diffstat (limited to 'drivers/iio/adc/ad7173.c')
| -rw-r--r-- | drivers/iio/adc/ad7173.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c index 5a65be00dd19..2eebc6f761a6 100644 --- a/drivers/iio/adc/ad7173.c +++ b/drivers/iio/adc/ad7173.c @@ -181,7 +181,11 @@ struct ad7173_channel_config { u8 cfg_slot; bool live; - /* Following fields are used to compare equality. */ + /* + * Following fields are used to compare equality. If you + * make adaptations in it, you most likely also have to adapt + * ad7173_find_live_config(), too. + */ struct_group(config_props, bool bipolar; bool input_buf; @@ -582,15 +586,28 @@ static struct ad7173_channel_config * ad7173_find_live_config(struct ad7173_state *st, struct ad7173_channel_config *cfg) { struct ad7173_channel_config *cfg_aux; - ptrdiff_t cmp_size; int i; - cmp_size = sizeof_field(struct ad7173_channel_config, config_props); + /* + * This is just to make sure that the comparison is adapted after + * struct ad7173_channel_config was changed. + */ + static_assert(sizeof_field(struct ad7173_channel_config, config_props) == + sizeof(struct { + bool bipolar; + bool input_buf; + u8 odr; + u8 ref_sel; + })); + for (i = 0; i < st->num_channels; i++) { cfg_aux = &st->channels[i].cfg; if (cfg_aux->live && - !memcmp(&cfg->config_props, &cfg_aux->config_props, cmp_size)) + cfg->bipolar == cfg_aux->bipolar && + cfg->input_buf == cfg_aux->input_buf && + cfg->odr == cfg_aux->odr && + cfg->ref_sel == cfg_aux->ref_sel) return cfg_aux; } return NULL; |