On Tue, 28 Sep 2021 09:41:54 +0800 Cai Huoqing <caihuoqing@xxxxxxxxx> wrote: > When possible use dev_err_probe help to properly deal with the > PROBE_DEFER error, the benefit is that DEFER issue will be logged > in the devices_deferred debugfs file. > Using dev_err_probe() can reduce code size, and the error value > gets printed. > > Signed-off-by: Cai Huoqing <caihuoqing@xxxxxxxxx> There is an explicit return of -EPROBE_DEFER in here that we should probably also handle. https://elixir.bootlin.com/linux/latest/source/drivers/iio/light/gp2ap002.c#L508 I guess simplest option is return dev_err_probe(dev, -EPROBE_DEFER, "no ADC, deferring\n"); > --- > drivers/iio/light/gp2ap002.c | 15 +++++++-------- > 1 file changed, 7 insertions(+), 8 deletions(-) > > diff --git a/drivers/iio/light/gp2ap002.c b/drivers/iio/light/gp2ap002.c > index f960be7d4001..724a3928ead1 100644 > --- a/drivers/iio/light/gp2ap002.c > +++ b/drivers/iio/light/gp2ap002.c > @@ -521,15 +521,14 @@ static int gp2ap002_probe(struct i2c_client *client, > } > > gp2ap002->vdd = devm_regulator_get(dev, "vdd"); > - if (IS_ERR(gp2ap002->vdd)) { > - dev_err(dev, "failed to get VDD regulator\n"); > - return PTR_ERR(gp2ap002->vdd); > - } > + if (IS_ERR(gp2ap002->vdd)) > + return dev_err_probe(dev, PTR_ERR(gp2ap002->vdd), > + "failed to get VDD regulator\n"); > + > gp2ap002->vio = devm_regulator_get(dev, "vio"); > - if (IS_ERR(gp2ap002->vio)) { > - dev_err(dev, "failed to get VIO regulator\n"); > - return PTR_ERR(gp2ap002->vio); > - } > + if (IS_ERR(gp2ap002->vio)) > + return dev_err_probe(dev, PTR_ERR(gp2ap002->vio), > + "failed to get VIO regulator\n"); > > /* Operating voltage 2.4V .. 3.6V according to datasheet */ > ret = regulator_set_voltage(gp2ap002->vdd, 2400000, 3600000);
