From b6883582a8ea6a7a70d4cc9f4c121ed3d8a75681 Mon Sep 17 00:00:00 2001
From: Eliad Peller <eliad@wizery.com>
Date: Wed, 31 Aug 2011 14:50:13 +0300
Subject: [PATCH] wl12xx: use kstrtoul_from_user

simplify code by calling kstrtoul_from_user() (instead of
copy_from_user() + kstrtoul())

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
---
 drivers/net/wireless/wl12xx/debugfs.c | 46 +++------------------------
 1 file changed, 5 insertions(+), 41 deletions(-)

diff --git a/drivers/net/wireless/wl12xx/debugfs.c b/drivers/net/wireless/wl12xx/debugfs.c
index d227385a8f9c..3999fd528302 100644
--- a/drivers/net/wireless/wl12xx/debugfs.c
+++ b/drivers/net/wireless/wl12xx/debugfs.c
@@ -265,18 +265,10 @@ static ssize_t gpio_power_write(struct file *file,
 			   size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
-	char buf[10];
-	size_t len;
 	unsigned long value;
 	int ret;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len)) {
-		return -EFAULT;
-	}
-	buf[len] = '\0';
-
-	ret = kstrtoul(buf, 0, &value);
+	ret = kstrtoul_from_user(user_buf, count, 10, &value);
 	if (ret < 0) {
 		wl1271_warning("illegal value in gpio_power");
 		return -EINVAL;
@@ -427,17 +419,10 @@ static ssize_t dtim_interval_write(struct file *file,
 				   size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
-	char buf[10];
-	size_t len;
 	unsigned long value;
 	int ret;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-	buf[len] = '\0';
-
-	ret = kstrtoul(buf, 0, &value);
+	ret = kstrtoul_from_user(user_buf, count, 10, &value);
 	if (ret < 0) {
 		wl1271_warning("illegal value for dtim_interval");
 		return -EINVAL;
@@ -492,17 +477,10 @@ static ssize_t beacon_interval_write(struct file *file,
 				     size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
-	char buf[10];
-	size_t len;
 	unsigned long value;
 	int ret;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-	buf[len] = '\0';
-
-	ret = kstrtoul(buf, 0, &value);
+	ret = kstrtoul_from_user(user_buf, count, 10, &value);
 	if (ret < 0) {
 		wl1271_warning("illegal value for beacon_interval");
 		return -EINVAL;
@@ -542,17 +520,10 @@ static ssize_t rx_streaming_interval_write(struct file *file,
 			   size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
-	char buf[10];
-	size_t len;
 	unsigned long value;
 	int ret;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-	buf[len] = '\0';
-
-	ret = kstrtoul(buf, 0, &value);
+	ret = kstrtoul_from_user(user_buf, count, 10, &value);
 	if (ret < 0) {
 		wl1271_warning("illegal value in rx_streaming_interval!");
 		return -EINVAL;
@@ -601,17 +572,10 @@ static ssize_t rx_streaming_always_write(struct file *file,
 			   size_t count, loff_t *ppos)
 {
 	struct wl1271 *wl = file->private_data;
-	char buf[10];
-	size_t len;
 	unsigned long value;
 	int ret;
 
-	len = min(count, sizeof(buf) - 1);
-	if (copy_from_user(buf, user_buf, len))
-		return -EFAULT;
-	buf[len] = '\0';
-
-	ret = kstrtoul(buf, 0, &value);
+	ret = kstrtoul_from_user(user_buf, count, 10, &value);
 	if (ret < 0) {
 		wl1271_warning("illegal value in rx_streaming_write!");
 		return -EINVAL;