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 --- sound/core/pcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/core/pcm.c b/sound/core/pcm.c index b163164a83ec..6fd3677685d7 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -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