linux-kernel - [PATCH v2] platform/x86: eeepc-laptop: use sysfs

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Message-Id: <20241023012905.15551-1-chenzhang@kylinos.cn>
Date: Wed, 23 Oct 2024 09:29:05 +0800
From: chen zhang <chenzhang@...inos.cn>
To: hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	corentin.chary@...il.com,
	luke@...nes.dev
Cc: platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	chenzhang_0901@....com,
	chen zhang <chenzhang@...inos.cn>
Subject: [PATCH v2] platform/x86: eeepc-laptop: use sysfs_emit() instead of sprintf()

Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: chen zhang <chenzhang@...inos.cn>
---
v2: add #include <linux/sysfs.h>
---
 drivers/platform/x86/eeepc-laptop.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 03319a80e114..f52fbc4924d4 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -25,6 +25,7 @@
 #include <linux/rfkill.h>
 #include <linux/pci.h>
 #include <linux/pci_hotplug.h>
+#include <linux/sysfs.h>
 #include <linux/leds.h>
 #include <linux/dmi.h>
 #include <acpi/video.h>
@@ -285,7 +286,7 @@ static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
 
 	if (value < 0)
 		return -EIO;
-	return sprintf(buf, "%d\n", value);
+	return sysfs_emit(buf, "%d\n", value);
 }
 
 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm)				\
@@ -361,7 +362,7 @@ static ssize_t cpufv_show(struct device *dev,
 
 	if (get_cpufv(eeepc, &c))
 		return -ENODEV;
-	return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
+	return sysfs_emit(buf, "%#x\n", (c.num << 8) | c.cur);
 }
 
 static ssize_t cpufv_store(struct device *dev,
@@ -393,7 +394,7 @@ static ssize_t cpufv_disabled_show(struct device *dev,
 {
 	struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
+	return sysfs_emit(buf, "%d\n", eeepc->cpufv_disabled);
 }
 
 static ssize_t cpufv_disabled_store(struct device *dev,
@@ -1025,7 +1026,7 @@ static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 
 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 {
-	return sprintf(buf, "%d\n", get());
+	return sysfs_emit(buf, "%d\n", get());
 }
 
 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get)				\
-- 
2.25.1