staging: rtl8188eu: Use kstrtoul() for string to long conversion

Signed-off-by: navin patidar <navin.patidar@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/include/osdep_service.h

@@ -211,9 +211,6 @@ u32  rtw_ms_to_systime(u32 ms);
 s32  rtw_get_passing_time_ms(u32 start);
 s32  rtw_get_time_interval_ms(u32 start, u32 end);
 
-
-u32  rtw_atoi(u8 *s);
-
 static inline unsigned char _cancel_timer_ex(struct timer_list *ptimer)
 {
 	return del_timer_sync(ptimer);

drivers/staging/rtl8188eu/os_dep/ioctl_linux.c

@@ -6590,9 +6590,10 @@ static int rtw_mp_rate(struct net_device *dev,
 			struct iw_request_info *info,
 			struct iw_point *wrqu, char *extra)
 {
-	u32 rate = MPT_RATE_1M;
+	unsigned long rate = MPT_RATE_1M;
 	char	*input = kmalloc(wrqu->length, GFP_KERNEL);
 	struct adapter *padapter = rtw_netdev_priv(dev);
+	int status;
 
 	if (!input)
 		return -ENOMEM;
@@ -6600,8 +6601,12 @@ static int rtw_mp_rate(struct net_device *dev,
 		kfree(input);
 		return -EFAULT;
 	}
-	rate = rtw_atoi(input);
-	sprintf(extra, "Set data rate to %d", rate);
+
+	status = kstrtoul(input, 0, &rate);
+	if (status)
+		return status;
+
+	sprintf(extra, "Set data rate to %lu", rate);
 	kfree(input);
 	if (rate <= 0x7f)
 		rate = wifirate2_ratetbl_inx((u8)rate);
@@ -6624,7 +6629,8 @@ static int rtw_mp_channel(struct net_device *dev,
 {
 	struct adapter *padapter = rtw_netdev_priv(dev);
 	char *input = kmalloc(wrqu->length, GFP_KERNEL);
-	u32	channel = 1;
+	unsigned long channel = 1;
+	int status;
 
 	if (!input)
 		return -ENOMEM;
@@ -6632,8 +6638,12 @@ static int rtw_mp_channel(struct net_device *dev,
 		kfree(input);
 		return -EFAULT;
 	}
-	channel = rtw_atoi(input);
-	sprintf(extra, "Change channel %d to channel %d", padapter->mppriv.channel, channel);
+
+	status = kstrtoul(input, 0, &channel);
+	if (status)
+		return status;
+
+	sprintf(extra, "Change channel %d to channel %lu", padapter->mppriv.channel, channel);
 
 	padapter->mppriv.channel = channel;
 	Hal_SetChannel(padapter);

drivers/staging/rtl8188eu/os_dep/osdep_service.c

@@ -39,23 +39,6 @@ inline int RTW_STATUS_CODE(int error_code)
 	return _FAIL;
 }
 
-u32 rtw_atoi(u8 *s)
-{
-	int num = 0, flag = 0;
-	int i;
-	for (i = 0; i <= strlen(s); i++) {
-		if (s[i] >= '0' && s[i] <= '9')
-			num = num * 10 + s[i] - '0';
-		else if (s[0] == '-' && i == 0)
-			flag = 1;
-		else
-			break;
-	}
-	if (flag == 1)
-		num = num * -1;
-	return num;
-}
-
 u8 *_rtw_malloc(u32 sz)
 {
 	u8	*pbuf = NULL;