On 23, March 2018 14:17, Jonathan Cameron wrote:
> On Sun, 18 Mar 2018 14:35:46 +0100
> David Veenstra <davidjulianveenstra@xxxxxxxxx> wrote:
>
>> Add variable to hold &spi->dev in ad2s1200_probe. This value is repeatedly
>> used in ad2s1200_probe.
>>
>> Signed-off-by: David Veenstra <davidjulianveenstra@xxxxxxxxx>
> I'm a little unconvinced by this one. It adds code to save
> a really very trivial bit of repetition. If it had been
> via another pointer or this would have made a big difference
> in number of lines by bringing a lot of entries below 80 chars
> that weren't previous, then there would be a good argument.
>
> Here, not so much.
The 9th patch adds another 4 occurrences. So in total &st->dev appears
9 times in ad2s1200_probe. To me it seemed worth it to
introduce a variable for it. But I agree that it doesn't add much.
Best regards,
David Veenstra
>
> Jonathan
>> ---
>> drivers/staging/iio/resolver/ad2s1200.c | 13 ++++++++-----
>> 1 file changed, 8 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/staging/iio/resolver/ad2s1200.c b/drivers/staging/iio/resolver/ad2s1200.c
>> index 00efba598671..eceb86e952de 100644
>> --- a/drivers/staging/iio/resolver/ad2s1200.c
>> +++ b/drivers/staging/iio/resolver/ad2s1200.c
>> @@ -118,19 +118,22 @@ static int ad2s1200_probe(struct spi_device *spi)
>> unsigned short *pins = spi->dev.platform_data;
>> struct ad2s1200_state *st;
>> struct iio_dev *indio_dev;
>> + struct device *dev;
>> int pn, ret = 0;
>>
>> + dev = &spi->dev;
>> +
>> for (pn = 0; pn < AD2S1200_PN; pn++) {
>> - ret = devm_gpio_request_one(&spi->dev, pins[pn], GPIOF_DIR_OUT,
>> + ret = devm_gpio_request_one(dev, pins[pn], GPIOF_DIR_OUT,
>> DRV_NAME);
>> if (ret) {
>> - dev_err(&spi->dev, "request gpio pin %d failed\n",
>> + dev_err(dev, "request gpio pin %d failed\n",
>> pins[pn]);
>> return ret;
>> }
>> }
>>
>> - indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
>> + indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
>> if (!indio_dev)
>> return -ENOMEM;
>>
>> @@ -141,14 +144,14 @@ static int ad2s1200_probe(struct spi_device *spi)
>> st->sample = pins[0];
>> st->rdvel = pins[1];
>>
>> - indio_dev->dev.parent = &spi->dev;
>> + indio_dev->dev.parent = dev;
>> indio_dev->info = &ad2s1200_info;
>> indio_dev->modes = INDIO_DIRECT_MODE;
>> indio_dev->channels = ad2s1200_channels;
>> indio_dev->num_channels = ARRAY_SIZE(ad2s1200_channels);
>> indio_dev->name = spi_get_device_id(spi)->name;
>>
>> - ret = devm_iio_device_register(&spi->dev, indio_dev);
>> + ret = devm_iio_device_register(dev, indio_dev);
>> if (ret)
>> return ret;
>>
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