diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
index 1ac8bf187168..ab710e37af99 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
@@ -262,7 +262,7 @@ static void mlxsw_hwmon_attr_add(struct mlxsw_hwmon *mlxsw_hwmon,
 
 static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon *mlxsw_hwmon)
 {
-	char mtcap_pl[MLXSW_REG_MTCAP_LEN];
+	char mtcap_pl[MLXSW_REG_MTCAP_LEN] = {0};
 	char mtmp_pl[MLXSW_REG_MTMP_LEN];
 	u8 sensor_count;
 	int i;
@@ -295,7 +295,7 @@ static int mlxsw_hwmon_temp_init(struct mlxsw_hwmon *mlxsw_hwmon)
 
 static int mlxsw_hwmon_fans_init(struct mlxsw_hwmon *mlxsw_hwmon)
 {
-	char mfcr_pl[MLXSW_REG_MFCR_LEN];
+	char mfcr_pl[MLXSW_REG_MFCR_LEN] = {0};
 	enum mlxsw_reg_mfcr_pwm_frequency freq;
 	unsigned int type_index;
 	unsigned int num;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index d652f7f030cb..2573faaffea8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -158,7 +158,7 @@ static void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
 
 static int mlxsw_sp_base_mac_get(struct mlxsw_sp *mlxsw_sp)
 {
-	char spad_pl[MLXSW_REG_SPAD_LEN];
+	char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
 	int err;
 
 	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(spad), spad_pl);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
index 8c8f5d8a2113..8d11e5447067 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
@@ -890,7 +890,7 @@ static const struct switchdev_ops mlxsw_sx_port_switchdev_ops = {
 
 static int mlxsw_sx_hw_id_get(struct mlxsw_sx *mlxsw_sx)
 {
-	char spad_pl[MLXSW_REG_SPAD_LEN];
+	char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
 	int err;
 
 	err = mlxsw_reg_query(mlxsw_sx->core, MLXSW_REG(spad), spad_pl);