From: <ye.xingchen@zte.com.cn>
To: <isely@pobox.com>
Cc: <mchehab@kernel.org>, <linux-media@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH] media: pvrusb2: use sysfs_emit() to instead of scnprintf()
Date: Thu, 1 Dec 2022 19:27:59 +0800 (CST) [thread overview]
Message-ID: <202212011927592559291@zte.com.cn> (raw)
From: ye xingchen <ye.xingchen@zte.com.cn>
Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
---
drivers/media/usb/pvrusb2/pvrusb2-sysfs.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c b/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
index 3e42e209be37..81c8b65bd9ef 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-sysfs.c
@@ -81,7 +81,7 @@ static ssize_t show_name(struct device *class_dev,
pvr2_sysfs_trace("pvr2_sysfs(%p) show_name(cid=%d) is %s",
cip->chptr, cip->ctl_id, name);
if (!name) return -EINVAL;
- return scnprintf(buf, PAGE_SIZE, "%s\n", name);
+ return sysfs_emit(buf, "%s\n", name);
}
static ssize_t show_type(struct device *class_dev,
@@ -102,7 +102,7 @@ static ssize_t show_type(struct device *class_dev,
}
pvr2_sysfs_trace("pvr2_sysfs(%p) show_type(cid=%d) is %s",
cip->chptr, cip->ctl_id, name);
- return scnprintf(buf, PAGE_SIZE, "%s\n", name);
+ return sysfs_emit(buf, "%s\n", name);
}
static ssize_t show_min(struct device *class_dev,
@@ -115,7 +115,7 @@ static ssize_t show_min(struct device *class_dev,
val = pvr2_ctrl_get_min(cip->cptr);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_min(cid=%d) is %ld",
cip->chptr, cip->ctl_id, val);
- return scnprintf(buf, PAGE_SIZE, "%ld\n", val);
+ return sysfs_emit(buf, "%ld\n", val);
}
static ssize_t show_max(struct device *class_dev,
@@ -128,7 +128,7 @@ static ssize_t show_max(struct device *class_dev,
val = pvr2_ctrl_get_max(cip->cptr);
pvr2_sysfs_trace("pvr2_sysfs(%p) show_max(cid=%d) is %ld",
cip->chptr, cip->ctl_id, val);
- return scnprintf(buf, PAGE_SIZE, "%ld\n", val);
+ return sysfs_emit(buf, "%ld\n", val);
}
static ssize_t show_def(struct device *class_dev,
@@ -551,7 +551,7 @@ static ssize_t v4l_minor_number_show(struct device *class_dev,
struct pvr2_sysfs *sfp;
sfp = dev_get_drvdata(class_dev);
if (!sfp) return -EINVAL;
- return scnprintf(buf,PAGE_SIZE,"%d\n",
+ return sysfs_emit(buf, "%d\n",
pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
pvr2_v4l_type_video));
}
@@ -563,7 +563,7 @@ static ssize_t bus_info_show(struct device *class_dev,
struct pvr2_sysfs *sfp;
sfp = dev_get_drvdata(class_dev);
if (!sfp) return -EINVAL;
- return scnprintf(buf,PAGE_SIZE,"%s\n",
+ return sysfs_emit(buf, "%s\n",
pvr2_hdw_get_bus_info(sfp->channel.hdw));
}
@@ -574,7 +574,7 @@ static ssize_t hdw_name_show(struct device *class_dev,
struct pvr2_sysfs *sfp;
sfp = dev_get_drvdata(class_dev);
if (!sfp) return -EINVAL;
- return scnprintf(buf,PAGE_SIZE,"%s\n",
+ return sysfs_emit(buf, "%s\n",
pvr2_hdw_get_type(sfp->channel.hdw));
}
@@ -585,7 +585,7 @@ static ssize_t hdw_desc_show(struct device *class_dev,
struct pvr2_sysfs *sfp;
sfp = dev_get_drvdata(class_dev);
if (!sfp) return -EINVAL;
- return scnprintf(buf,PAGE_SIZE,"%s\n",
+ return sysfs_emit(buf, "%s\n",
pvr2_hdw_get_desc(sfp->channel.hdw));
}
@@ -597,7 +597,7 @@ static ssize_t v4l_radio_minor_number_show(struct device *class_dev,
struct pvr2_sysfs *sfp;
sfp = dev_get_drvdata(class_dev);
if (!sfp) return -EINVAL;
- return scnprintf(buf,PAGE_SIZE,"%d\n",
+ return sysfs_emit(buf, "%d\n",
pvr2_hdw_v4l_get_minor_number(sfp->channel.hdw,
pvr2_v4l_type_radio));
}
@@ -609,7 +609,7 @@ static ssize_t unit_number_show(struct device *class_dev,
struct pvr2_sysfs *sfp;
sfp = dev_get_drvdata(class_dev);
if (!sfp) return -EINVAL;
- return scnprintf(buf,PAGE_SIZE,"%d\n",
+ return sysfs_emit(buf, "%d\n",
pvr2_hdw_get_unit_number(sfp->channel.hdw));
}
--
2.25.1
next reply other threads:[~2022-12-01 11:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-01 11:27 ye.xingchen [this message]
2022-12-01 11:49 ` [PATCH] media: pvrusb2: use sysfs_emit() to instead of scnprintf() Tommaso Merciai
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