Input: convert drivers to use strict_strtoul()

strict_strtoul() allows newline character at the end of the the input
string and therefore is more user-friendly.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

6 files changed, 53 insertions, 51 deletions

diff --git a/drivers/input/keyboard/atkbd.c b/drivers/input/keyboard/atkbd.c
index b1ce10f50bc..44745727aea 100644
--- a/drivers/input/keyboard/atkbd.c
+++ b/drivers/input/keyboard/atkbd.c
@@ -1207,15 +1207,13 @@ static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t coun
 {
 	struct input_dev *old_dev, *new_dev;
 	unsigned long value;
-	char *rest;
 	int err;
 	unsigned char old_extra, old_set;
 
 	if (!atkbd->write)
 		return -EIO;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 1)
+	if (strict_strtoul(buf, 10, &value) || value > 1)
 		return -EINVAL;
 
 	if (atkbd->extra != value) {
@@ -1264,12 +1262,10 @@ static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t cou
 {
 	struct input_dev *old_dev, *new_dev;
 	unsigned long value;
-	char *rest;
 	int err;
 	unsigned char old_scroll;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 1)
+	if (strict_strtoul(buf, 10, &value) || value > 1)
 		return -EINVAL;
 
 	if (atkbd->scroll != value) {
@@ -1310,15 +1306,13 @@ static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
 {
 	struct input_dev *old_dev, *new_dev;
 	unsigned long value;
-	char *rest;
 	int err;
 	unsigned char old_set, old_extra;
 
 	if (!atkbd->write)
 		return -EIO;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || (value != 2 && value != 3))
+	if (strict_strtoul(buf, 10, &value) || (value != 2 && value != 3))
 		return -EINVAL;
 
 	if (atkbd->set != value) {
@@ -1361,15 +1355,13 @@ static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t
 {
 	struct input_dev *old_dev, *new_dev;
 	unsigned long value;
-	char *rest;
 	int err;
 	unsigned char old_softrepeat, old_softraw;
 
 	if (!atkbd->write)
 		return -EIO;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 1)
+	if (strict_strtoul(buf, 10, &value) || value > 1)
 		return -EINVAL;
 
 	if (atkbd->softrepeat != value) {
@@ -1413,12 +1405,10 @@ static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t co
 {
 	struct input_dev *old_dev, *new_dev;
 	unsigned long value;
-	char *rest;
 	int err;
 	unsigned char old_softraw;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 1)
+	if (strict_strtoul(buf, 10, &value) || value > 1)
 		return -EINVAL;
 
 	if (atkbd->softraw != value) {
diff --git a/drivers/input/mouse/logips2pp.c b/drivers/input/mouse/logips2pp.c
index 0c5660d28ca..390f1dbb98a 100644
--- a/drivers/input/mouse/logips2pp.c
+++ b/drivers/input/mouse/logips2pp.c
@@ -157,10 +157,8 @@ static ssize_t ps2pp_attr_show_smartscroll(struct psmouse *psmouse, void *data,
 static ssize_t ps2pp_attr_set_smartscroll(struct psmouse *psmouse, void *data, const char *buf, size_t count)
 {
 	unsigned long value;
-	char *rest;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 1)
+	if (strict_strtoul(buf, 10, &value) || value > 1)
 		return -EINVAL;
 
 	ps2pp_set_smartscroll(psmouse, value);
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index f5a6be1d3c4..9fcb00b8e1a 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -1433,10 +1433,8 @@ static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const
 {
 	unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
 	unsigned long value;
-	char *rest;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest)
+	if (strict_strtoul(buf, 10, &value))
 		return -EINVAL;
 
 	if ((unsigned int)value != value)
@@ -1549,10 +1547,8 @@ static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, co
 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
 {
 	unsigned long value;
-	char *rest;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest)
+	if (strict_strtoul(buf, 10, &value))
 		return -EINVAL;
 
 	psmouse->set_rate(psmouse, value);
@@ -1562,10 +1558,8 @@ static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const
 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
 {
 	unsigned long value;
-	char *rest;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest)
+	if (strict_strtoul(buf, 10, &value))
 		return -EINVAL;
 
 	psmouse->set_resolution(psmouse, value);
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 26b845fc186..e68c814c436 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -89,10 +89,8 @@ static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
 	struct trackpoint_attr_data *attr = data;
 	unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
 	unsigned long value;
-	char *rest;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 255)
+	if (strict_strtoul(buf, 10, &value) || value > 255)
 		return -EINVAL;
 
 	*field = value;
@@ -117,10 +115,8 @@ static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
 	struct trackpoint_attr_data *attr = data;
 	unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
 	unsigned long value;
-	char *rest;
 
-	value = simple_strtoul(buf, &rest, 10);
-	if (*rest || value > 1)
+	if (strict_strtoul(buf, 10, &value) || value > 1)
 		return -EINVAL;
 
 	if (attr->inverted)
diff --git a/drivers/input/tablet/aiptek.c b/drivers/input/tablet/aiptek.c
index 8f037a1d44a..e53c838f186 100644
--- a/drivers/input/tablet/aiptek.c
+++ b/drivers/input/tablet/aiptek.c
@@ -1202,16 +1202,22 @@ static ssize_t
 store_tabletXtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
-	int x;
+	long x;
+
+	if (strict_strtol(buf, 10, &x)) {
+		size_t len = buf[count - 1] == '\n' ? count - 1 : count;
+
+		if (strncmp(buf, "disable", len))
+			return -EINVAL;
 
-	if (strcmp(buf, "disable") == 0) {
 		aiptek->newSetting.xTilt = AIPTEK_TILT_DISABLE;
 	} else {
-		x = (int)simple_strtol(buf, NULL, 10);
-		if (x >= AIPTEK_TILT_MIN && x <= AIPTEK_TILT_MAX) {
-			aiptek->newSetting.xTilt = x;
-		}
+		if (x < AIPTEK_TILT_MIN || x > AIPTEK_TILT_MAX)
+			return -EINVAL;
+
+		aiptek->newSetting.xTilt = x;
 	}
+
 	return count;
 }
 
@@ -1238,16 +1244,22 @@ static ssize_t
 store_tabletYtilt(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
-	int y;
+	long y;
+
+	if (strict_strtol(buf, 10, &y)) {
+		size_t len = buf[count - 1] == '\n' ? count - 1 : count;
+
+		if (strncmp(buf, "disable", len))
+			return -EINVAL;
 
-	if (strcmp(buf, "disable") == 0) {
 		aiptek->newSetting.yTilt = AIPTEK_TILT_DISABLE;
 	} else {
-		y = (int)simple_strtol(buf, NULL, 10);
-		if (y >= AIPTEK_TILT_MIN && y <= AIPTEK_TILT_MAX) {
-			aiptek->newSetting.yTilt = y;
-		}
+		if (y < AIPTEK_TILT_MIN || y > AIPTEK_TILT_MAX)
+			return -EINVAL;
+
+		aiptek->newSetting.yTilt = y;
 	}
+
 	return count;
 }
 
@@ -1269,8 +1281,12 @@ static ssize_t
 store_tabletJitterDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
+	long j;
+
+	if (strict_strtol(buf, 10, &j))
+		return -EINVAL;
 
-	aiptek->newSetting.jitterDelay = (int)simple_strtol(buf, NULL, 10);
+	aiptek->newSetting.jitterDelay = (int)j;
 	return count;
 }
 
@@ -1294,8 +1310,12 @@ static ssize_t
 store_tabletProgrammableDelay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
+	long d;
 
-	aiptek->newSetting.programmableDelay = (int)simple_strtol(buf, NULL, 10);
+	if (strict_strtol(buf, 10, &d))
+		return -EINVAL;
+
+	aiptek->newSetting.programmableDelay = (int)d;
 	return count;
 }
 
@@ -1541,8 +1561,11 @@ static ssize_t
 store_tabletWheel(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
 {
 	struct aiptek *aiptek = dev_get_drvdata(dev);
+	long w;
+
+	if (strict_strtol(buf, 10, &w)) return -EINVAL;
 
-	aiptek->newSetting.wheel = (int)simple_strtol(buf, NULL, 10);
+	aiptek->newSetting.wheel = (int)w;
 	return count;
 }
 
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index ce6f48c695f..efbbbe48621 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -461,10 +461,11 @@ static ssize_t ads7846_disable_store(struct device *dev,
 				     const char *buf, size_t count)
 {
 	struct ads7846 *ts = dev_get_drvdata(dev);
-	char *endp;
-	int i;
+	long i;
+
+	if (strict_strtoul(buf, 10, &i))
+		return -EINVAL;
 
-	i = simple_strtoul(buf, &endp, 10);
 	spin_lock_irq(&ts->lock);
 
 	if (i)