On Fri, Apr 09, 2021 at 07:40:57AM -0700, Joe Perches wrote:
> On Fri, 2021-04-09 at 00:09 -0300, Luiz Sampaio wrote:
> > Since there is only one statement inside the if clause, no brackets are
> > required.
> []
> > diff --git a/drivers/w1/slaves/w1_ds2438.c b/drivers/w1/slaves/w1_ds2438.c
> []
> > @@ -287,9 +287,9 @@ static ssize_t iad_read(struct file *filp, struct kobject *kobj,
> > if (!buf)
> > return -EINVAL;
> >
> >
> > - if (w1_ds2438_get_current(sl, &voltage) == 0) {
> > + if (w1_ds2438_get_current(sl, &voltage) == 0)
> > ret = snprintf(buf, count, "%i\n", voltage);
> > - } else
> > + else
> > ret = -EIO;
> >
> >
> > return ret;
>
> to me this would look better using a style like the below:
> (and it might be better using sysfs_emit and not snprintf too)
>
> ---
> drivers/w1/slaves/w1_ds2438.c | 36 ++++++++++++------------------------
> 1 file changed, 12 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/w1/slaves/w1_ds2438.c b/drivers/w1/slaves/w1_ds2438.c
> index 5cfb0ae23e91..9115c5a9bc4f 100644
> --- a/drivers/w1/slaves/w1_ds2438.c
> +++ b/drivers/w1/slaves/w1_ds2438.c
> @@ -279,7 +279,6 @@ static ssize_t iad_read(struct file *filp, struct kobject *kobj,
> loff_t off, size_t count)
> {
> struct w1_slave *sl = kobj_to_w1_slave(kobj);
> - int ret;
> int16_t voltage;
>
> if (off != 0)
> @@ -287,12 +286,10 @@ static ssize_t iad_read(struct file *filp, struct kobject *kobj,
> if (!buf)
> return -EINVAL;
>
> - if (w1_ds2438_get_current(sl, &voltage) == 0) {
> - ret = snprintf(buf, count, "%i\n", voltage);
> - } else
> - ret = -EIO;
> + if (w1_ds2438_get_current(sl, &voltage))
> + return -EIO;
>
> - return ret;
> + return snprintf(buf, count, "%i\n", voltage);
> }
>
> static ssize_t page0_read(struct file *filp, struct kobject *kobj,
> @@ -330,7 +327,6 @@ static ssize_t temperature_read(struct file *filp, struct kobject *kobj,
> loff_t off, size_t count)
> {
> struct w1_slave *sl = kobj_to_w1_slave(kobj);
> - int ret;
> int16_t temp;
>
> if (off != 0)
> @@ -338,12 +334,10 @@ static ssize_t temperature_read(struct file *filp, struct kobject *kobj,
> if (!buf)
> return -EINVAL;
>
> - if (w1_ds2438_get_temperature(sl, &temp) == 0) {
> - ret = snprintf(buf, count, "%i\n", temp);
> - } else
> - ret = -EIO;
> + if (w1_ds2438_get_temperature(sl, &temp))
> + return -EIO;
>
> - return ret;
> + return snprintf(buf, count, "%i\n", temp);
> }
>
> static ssize_t vad_read(struct file *filp, struct kobject *kobj,
> @@ -351,7 +345,6 @@ static ssize_t vad_read(struct file *filp, struct kobject *kobj,
> loff_t off, size_t count)
> {
> struct w1_slave *sl = kobj_to_w1_slave(kobj);
> - int ret;
> uint16_t voltage;
>
> if (off != 0)
> @@ -359,12 +352,10 @@ static ssize_t vad_read(struct file *filp, struct kobject *kobj,
> if (!buf)
> return -EINVAL;
>
> - if (w1_ds2438_get_voltage(sl, DS2438_ADC_INPUT_VAD, &voltage) == 0) {
> - ret = snprintf(buf, count, "%u\n", voltage);
> - } else
> - ret = -EIO;
> + if (w1_ds2438_get_voltage(sl, DS2438_ADC_INPUT_VAD, &voltage))
> + return -EIO;
>
> - return ret;
> + return snprintf(buf, count, "%u\n", voltage);
> }
>
> static ssize_t vdd_read(struct file *filp, struct kobject *kobj,
> @@ -372,7 +363,6 @@ static ssize_t vdd_read(struct file *filp, struct kobject *kobj,
> loff_t off, size_t count)
> {
> struct w1_slave *sl = kobj_to_w1_slave(kobj);
> - int ret;
> uint16_t voltage;
>
> if (off != 0)
> @@ -380,12 +370,10 @@ static ssize_t vdd_read(struct file *filp, struct kobject *kobj,
> if (!buf)
> return -EINVAL;
>
> - if (w1_ds2438_get_voltage(sl, DS2438_ADC_INPUT_VDD, &voltage) == 0) {
> - ret = snprintf(buf, count, "%u\n", voltage);
> - } else
> - ret = -EIO;
> + if (w1_ds2438_get_voltage(sl, DS2438_ADC_INPUT_VDD, &voltage))
> + return -EIO;
>
> - return ret;
> + return snprintf(buf, count, "%u\n", voltage);
> }
>
> static BIN_ATTR(iad, S_IRUGO | S_IWUSR | S_IWGRP, iad_read, iad_write, 0);
>
Sorry for the late reply! I agree, this would look nicer. I will wait for
the current revision and change this for the next one.
