diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
index 7e64033d7de39ed7723c162c75e24cf49cd3d6fa..0706623cfb96abf74b2d6ebb15d15f05d18504f5 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
@@ -226,7 +226,7 @@ void __mlx4_cq_free_icm(struct mlx4_dev *dev, int cqn)
 
 static void mlx4_cq_free_icm(struct mlx4_dev *dev, int cqn)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index d180bc46826afd0189eb7aa0360baf598615c02b..16abde20e1fcd2daaefc6b9a671b4c6c1a4313bb 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -1555,7 +1555,7 @@ void __mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
 
 void mlx4_counter_free(struct mlx4_dev *dev, u32 idx)
 {
-	u64 in_param;
+	u64 in_param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&in_param, idx);
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index cf883345af8887eeac97eb5b7278b98a98ffe4bb..d738454116a088db7a098c88f2ef5fc9b7eb1698 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -1235,7 +1235,7 @@ int mlx4_get_qp_per_mgm(struct mlx4_dev *dev);
 
 static inline void set_param_l(u64 *arg, u32 val)
 {
-	*((u32 *)arg) = val;
+	*arg = (*arg & 0xffffffff00000000ULL) | (u64) val;
 }
 
 static inline void set_param_h(u64 *arg, u32 val)
diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c
index 602ca9bf78e46b22ec921140c4539105b8597454..f91719a08cbac000dc34f68f7d40252aa652ac58 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mr.c
@@ -183,7 +183,7 @@ u32 __mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order)
 
 static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	u64 out_param;
 	int err;
 
@@ -240,7 +240,7 @@ void __mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order)
 
 static void mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
@@ -351,7 +351,7 @@ void __mlx4_mpt_release(struct mlx4_dev *dev, u32 index)
 
 static void mlx4_mpt_release(struct mlx4_dev *dev, u32 index)
 {
-	u64 in_param;
+	u64 in_param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&in_param, index);
@@ -374,7 +374,7 @@ int __mlx4_mpt_alloc_icm(struct mlx4_dev *dev, u32 index)
 
 static int mlx4_mpt_alloc_icm(struct mlx4_dev *dev, u32 index)
 {
-	u64 param;
+	u64 param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&param, index);
@@ -395,7 +395,7 @@ void __mlx4_mpt_free_icm(struct mlx4_dev *dev, u32 index)
 
 static void mlx4_mpt_free_icm(struct mlx4_dev *dev, u32 index)
 {
-	u64 in_param;
+	u64 in_param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&in_param, index);
diff --git a/drivers/net/ethernet/mellanox/mlx4/pd.c b/drivers/net/ethernet/mellanox/mlx4/pd.c
index 1ac88637ad9de145f81d9e4851fda2387da12158..00f223acada79a8f0bf6b52ae21e75afbfb60ce0 100644
--- a/drivers/net/ethernet/mellanox/mlx4/pd.c
+++ b/drivers/net/ethernet/mellanox/mlx4/pd.c
@@ -101,7 +101,7 @@ void __mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
 
 void mlx4_xrcd_free(struct mlx4_dev *dev, u32 xrcdn)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c
index 719ead15e49181f1fc419b0c18310db521280eff..10c57c86388baed3626cc803fc8acadf605ca855 100644
--- a/drivers/net/ethernet/mellanox/mlx4/port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/port.c
@@ -175,7 +175,7 @@ EXPORT_SYMBOL_GPL(__mlx4_register_mac);
 
 int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac)
 {
-	u64 out_param;
+	u64 out_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
@@ -222,7 +222,7 @@ EXPORT_SYMBOL_GPL(__mlx4_unregister_mac);
 
 void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, u64 mac)
 {
-	u64 out_param;
+	u64 out_param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&out_param, port);
@@ -361,7 +361,7 @@ static int __mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan,
 
 int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
 {
-	u64 out_param;
+	u64 out_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
@@ -406,7 +406,7 @@ static void __mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
 
 void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
diff --git a/drivers/net/ethernet/mellanox/mlx4/qp.c b/drivers/net/ethernet/mellanox/mlx4/qp.c
index 81e2abe07bbbf656689ba327ab0d4d22368961df..e891b058c1befdc09927ea1ab49aa70e282d4278 100644
--- a/drivers/net/ethernet/mellanox/mlx4/qp.c
+++ b/drivers/net/ethernet/mellanox/mlx4/qp.c
@@ -222,7 +222,7 @@ int __mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align,
 
 int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	u64 out_param;
 	int err;
 
@@ -255,7 +255,7 @@ void __mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
 
 void mlx4_qp_release_range(struct mlx4_dev *dev, int base_qpn, int cnt)
 {
-	u64 in_param;
+	u64 in_param = 0;
 	int err;
 
 	if (mlx4_is_mfunc(dev)) {
@@ -319,7 +319,7 @@ int __mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
 
 static int mlx4_qp_alloc_icm(struct mlx4_dev *dev, int qpn)
 {
-	u64 param;
+	u64 param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&param, qpn);
@@ -344,7 +344,7 @@ void __mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
 
 static void mlx4_qp_free_icm(struct mlx4_dev *dev, int qpn)
 {
-	u64 in_param;
+	u64 in_param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&in_param, qpn);
diff --git a/drivers/net/ethernet/mellanox/mlx4/srq.c b/drivers/net/ethernet/mellanox/mlx4/srq.c
index feda6c00829f391e0d5bd822db970c5d6a2f7ca2..e329fe1f11b736d8e717880c7e6e7e092db2a14c 100644
--- a/drivers/net/ethernet/mellanox/mlx4/srq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/srq.c
@@ -149,7 +149,7 @@ void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
 
 static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
 {
-	u64 in_param;
+	u64 in_param = 0;
 
 	if (mlx4_is_mfunc(dev)) {
 		set_param_l(&in_param, srqn);