linux-kernel - [PATCH v2] platform/x86: dell-dcdbase: Replace snprintf in show functions with sysfs

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Message-Id: <20241022030500.9986-1-zenghongling@kylinos.cn>
Date: Tue, 22 Oct 2024 11:05:00 +0800
From: Hongling Zeng <zenghongling@...inos.cn>
To: linux-kernel@...r.kernel.org,
	platform-driver-x86@...r.kernel.org
Cc: stuart.w.hayes@...il.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	zhongling0719@....com,
	Hongling Zeng <zenghongling@...inos.cn>
Subject: [PATCH v2] platform/x86: dell-dcdbase: Replace snprintf in show  functions with sysfs_emit

show() must not use snprintf() when formatting the value to be
returned to user space.

Signed-off-by: Hongling Zeng <zenghongling@...inos.cn>
---
 drivers/platform/x86/dell/dcdbas.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/dell/dcdbas.c b/drivers/platform/x86/dell/dcdbas.c
index a60e350..c2fef23 100644
--- a/drivers/platform/x86/dell/dcdbas.c
+++ b/drivers/platform/x86/dell/dcdbas.c
@@ -31,6 +31,7 @@
 #include <linux/string.h>
 #include <linux/types.h>
 #include <linux/mutex.h>
+#include <linux/sysfs.h>
 
 #include "dcdbas.h"
 
@@ -132,14 +133,14 @@ static ssize_t smi_data_buf_phys_addr_show(struct device *dev,
 					   struct device_attribute *attr,
 					   char *buf)
 {
-	return sprintf(buf, "%x\n", (u32)smi_buf.dma);
+	return sysfs_emit(buf, "%x\n", (u32)smi_buf.dma);
 }
 
 static ssize_t smi_data_buf_size_show(struct device *dev,
 				      struct device_attribute *attr,
 				      char *buf)
 {
-	return sprintf(buf, "%lu\n", smi_buf.size);
+	return sysfs_emit(buf, "%lu\n", smi_buf.size);
 }
 
 static ssize_t smi_data_buf_size_store(struct device *dev,
@@ -200,7 +201,7 @@ static ssize_t host_control_action_show(struct device *dev,
 					struct device_attribute *attr,
 					char *buf)
 {
-	return sprintf(buf, "%u\n", host_control_action);
+	return sysfs_emit(buf, "%u\n", host_control_action);
 }
 
 static ssize_t host_control_action_store(struct device *dev,
@@ -224,7 +225,7 @@ static ssize_t host_control_smi_type_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
-	return sprintf(buf, "%u\n", host_control_smi_type);
+	return sysfs_emit(buf, "%u\n", host_control_smi_type);
 }
 
 static ssize_t host_control_smi_type_store(struct device *dev,
@@ -239,7 +240,7 @@ static ssize_t host_control_on_shutdown_show(struct device *dev,
 					     struct device_attribute *attr,
 					     char *buf)
 {
-	return sprintf(buf, "%u\n", host_control_on_shutdown);
+	return sysfs_emit(buf, "%u\n", host_control_on_shutdown);
 }
 
 static ssize_t host_control_on_shutdown_store(struct device *dev,
-- 
2.1.0