> On Apr 23, 2019, at 09:33, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > > - > + dac = pwm_to_dac(pwm, data->config & MAX6650_CFG_V12); > + err = i2c_smbus_write_byte_data(client, MAX6650_REG_DAC, dac); > + if (!err) > + data->dac = dac; > mutex_unlock(&data->update_lock); > > return err < 0 ? err : count; When I created max6650_set_cur_state, I copied over the pwm1_store code. I ended up with a "return err < 0 ? ..." which I adjusted. However, as my colleague pointed out, the set_cur_state return style matches that of i2c_smbus_write_byte_data so we should simply "return err;" in max6650_set_cur_state. Since the driver is in great flux state right now, I cannot make a patch only for that and you should probably just include that in your series. Or I can submit it later when your series is applied?