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media: bttv: use DEVICE_ATTR_RO() helper macro

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Use DEVICE_ATTR_RO() helper macro instead of DEVICE_ATTR(), which is
simpler and more readable.

Due to the name of the read function of the sysfs attribute is normalized,
there is a natural association.

Link: https://lore.kernel.org/linux-media/20210603071009.11438-1-thunder.leizhen@huawei.com

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Zhen Lei 2021-06-03 09:10:09 +02:00 committed by Mauro Carvalho Chehab
parent e67219b049
commit 9b4d7b5c81
1 changed files with 2 additions and 2 deletions
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4
drivers/media/pci/bt8xx/bttv-driver.c
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@ -170,14 +170,14 @@ MODULE_VERSION(BTTV_VERSION);
/* ----------------------------------------------------------------------- */ /* ----------------------------------------------------------------------- */
/* sysfs */ /* sysfs */
static ssize_t show_card(struct device *cd, static ssize_t card_show(struct device *cd,
struct device_attribute *attr, char *buf) struct device_attribute *attr, char *buf)
{ {
struct video_device *vfd = to_video_device(cd); struct video_device *vfd = to_video_device(cd);
struct bttv *btv = video_get_drvdata(vfd); struct bttv *btv = video_get_drvdata(vfd);
return sprintf(buf, "%d\n", btv ? btv->c.type : UNSET); return sprintf(buf, "%d\n", btv ? btv->c.type : UNSET);
} }
static DEVICE_ATTR(card, S_IRUGO, show_card, NULL); static DEVICE_ATTR_RO(card);
/* ----------------------------------------------------------------------- */ /* ----------------------------------------------------------------------- */
/* dvb auto-load setup */ /* dvb auto-load setup */