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ALSA: pcm: use DEVICE_ATTR_RO macro 

Use DEVICE_ATTR_RO() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20210524120007.39728-1-yuehaibing@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
YueHaibing 2021-05-24 20:00:07 +08:00 committed by Takashi Iwai
parent a38e93302e
commit e1dc219af7
1 changed files with 2 additions and 2 deletions
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4
sound/core/pcm.c
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@ -1004,7 +1004,7 @@ void snd_pcm_detach_substream(struct snd_pcm_substream *substream)
substream->pstr->substream_opened--;
}
static ssize_t show_pcm_class(struct device *dev,
static ssize_t pcm_class_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct snd_pcm_str *pstr = container_of(dev, struct snd_pcm_str, dev);
@ -1024,7 +1024,7 @@ static ssize_t show_pcm_class(struct device *dev,
return sprintf(buf, "%s\n", str);
}
static DEVICE_ATTR(pcm_class, 0444, show_pcm_class, NULL);
static DEVICE_ATTR_RO(pcm_class);
static struct attribute *pcm_dev_attrs[] = {
&dev_attr_pcm_class.attr,
NULL