2021-05-24 12:03:31

by Yue Haibing

Subject: [PATCH -next] 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 <[email protected]>
---
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
--
2.17.1

2021-05-25 08:10:08

by Takashi Iwai

Subject: Re: [PATCH -next] ALSA: pcm: use DEVICE_ATTR_RO macro

On Mon, 24 May 2021 14:00:07 +0200,
YueHaibing wrote:
>
> 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 <[email protected]>

Thanks, applied.


Takashi