diff --git a/drivers/input/mouse/elan_i2c_smbus.c b/drivers/input/mouse/elan_i2c_smbus.c
index cb6aecbc1dc2..25dba1d7aa57 100644
--- a/drivers/input/mouse/elan_i2c_smbus.c
+++ b/drivers/input/mouse/elan_i2c_smbus.c
@@ -130,7 +130,7 @@ static int elan_smbus_get_baseline_data(struct i2c_client *client,
 					bool max_baseline, u8 *value)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  max_baseline ?
@@ -149,7 +149,7 @@ static int elan_smbus_get_version(struct i2c_client *client,
 				  bool iap, u8 *version)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  iap ? ETP_SMBUS_IAP_VERSION_CMD :
@@ -169,7 +169,7 @@ static int elan_smbus_get_sm_version(struct i2c_client *client,
 				     u8 *ic_type, u8 *version)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  ETP_SMBUS_SM_VERSION_CMD, val);
@@ -186,7 +186,7 @@ static int elan_smbus_get_sm_version(struct i2c_client *client,
 static int elan_smbus_get_product_id(struct i2c_client *client, u16 *id)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  ETP_SMBUS_UNIQUEID_CMD, val);
@@ -203,7 +203,7 @@ static int elan_smbus_get_checksum(struct i2c_client *client,
 				   bool iap, u16 *csum)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  iap ? ETP_SMBUS_FW_CHECKSUM_CMD :
@@ -223,7 +223,7 @@ static int elan_smbus_get_max(struct i2c_client *client,
 			      unsigned int *max_x, unsigned int *max_y)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client, ETP_SMBUS_RANGE_CMD, val);
 	if (error) {
@@ -241,7 +241,7 @@ static int elan_smbus_get_resolution(struct i2c_client *client,
 				     u8 *hw_res_x, u8 *hw_res_y)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  ETP_SMBUS_RESOLUTION_CMD, val);
@@ -261,7 +261,7 @@ static int elan_smbus_get_num_traces(struct i2c_client *client,
 				     unsigned int *y_traces)
 {
 	int error;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client,
 					  ETP_SMBUS_XY_TRACENUM_CMD, val);
@@ -288,7 +288,7 @@ static int elan_smbus_iap_get_mode(struct i2c_client *client,
 {
 	int error;
 	u16 constant;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	error = i2c_smbus_read_block_data(client, ETP_SMBUS_IAP_CTRL_CMD, val);
 	if (error < 0) {
@@ -339,7 +339,7 @@ static int elan_smbus_prepare_fw_update(struct i2c_client *client)
 	int len;
 	int error;
 	enum tp_mode mode;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 	u8 cmd[4] = {0x0F, 0x78, 0x00, 0x06};
 	u16 password;
 
@@ -413,7 +413,7 @@ static int elan_smbus_write_fw_block(struct i2c_client *client,
 	struct device *dev = &client->dev;
 	int error;
 	u16 result;
-	u8 val[3];
+	u8 val[I2C_SMBUS_BLOCK_MAX] = {0};
 
 	/*
 	 * Due to the limitation of smbus protocol limiting