diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index c591616dccde7ca0e2632e2b77f4a7e366a2062d..2fc8ccebaac13a9d72fd919dee0a2f7fc6c0de6d 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -169,7 +169,7 @@ static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
 	props->phys_state	= out_mad->data[33] >> 4;
 	props->port_cap_flags	= be32_to_cpup((__be32 *) (out_mad->data + 20));
 	props->gid_tbl_len	= to_mdev(ibdev)->dev->caps.gid_table_len[port];
-	props->max_msg_sz	= 0x80000000;
+	props->max_msg_sz	= to_mdev(ibdev)->dev->caps.max_msg_sz;
 	props->pkey_tbl_len	= to_mdev(ibdev)->dev->caps.pkey_table_len[port];
 	props->bad_pkey_cntr	= be16_to_cpup((__be16 *) (out_mad->data + 46));
 	props->qkey_viol_cntr	= be16_to_cpup((__be16 *) (out_mad->data + 48));
diff --git a/drivers/net/mlx4/fw.c b/drivers/net/mlx4/fw.c
index d2b065351e4511fda36c5e4bd101c15e2fd647b6..c45cbe43a0c483830891e109beb306d11dc51d2a 100644
--- a/drivers/net/mlx4/fw.c
+++ b/drivers/net/mlx4/fw.c
@@ -138,6 +138,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
 #define QUERY_DEV_CAP_ACK_DELAY_OFFSET		0x35
 #define QUERY_DEV_CAP_MTU_WIDTH_OFFSET		0x36
 #define QUERY_DEV_CAP_VL_PORT_OFFSET		0x37
+#define QUERY_DEV_CAP_MAX_MSG_SZ_OFFSET		0x38
 #define QUERY_DEV_CAP_MAX_GID_OFFSET		0x3b
 #define QUERY_DEV_CAP_RATE_SUPPORT_OFFSET	0x3c
 #define QUERY_DEV_CAP_MAX_PKEY_OFFSET		0x3f
@@ -220,6 +221,8 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
 	dev_cap->local_ca_ack_delay = field & 0x1f;
 	MLX4_GET(field, outbox, QUERY_DEV_CAP_VL_PORT_OFFSET);
 	dev_cap->num_ports = field & 0xf;
+	MLX4_GET(field, outbox, QUERY_DEV_CAP_MAX_MSG_SZ_OFFSET);
+	dev_cap->max_msg_sz = 1 << (field & 0x1f);
 	MLX4_GET(stat_rate, outbox, QUERY_DEV_CAP_RATE_SUPPORT_OFFSET);
 	dev_cap->stat_rate_support = stat_rate;
 	MLX4_GET(dev_cap->flags, outbox, QUERY_DEV_CAP_FLAGS_OFFSET);
diff --git a/drivers/net/mlx4/fw.h b/drivers/net/mlx4/fw.h
index 296254ac27c14b0a5fbfa0f3789e149e91336e80..7e1dd9e25cfbabb9fa995d51c2c1fbf149518de6 100644
--- a/drivers/net/mlx4/fw.h
+++ b/drivers/net/mlx4/fw.h
@@ -60,6 +60,7 @@ struct mlx4_dev_cap {
 	int max_rdma_global;
 	int local_ca_ack_delay;
 	int num_ports;
+	u32 max_msg_sz;
 	int max_mtu[MLX4_MAX_PORTS + 1];
 	int max_port_width[MLX4_MAX_PORTS + 1];
 	int max_vl[MLX4_MAX_PORTS + 1];
diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c
index c3da2a2f543127c7b89a34af0b1279923b4a3496..a4f2e0475a719e249358a54f5cd2c892ad5c12e0 100644
--- a/drivers/net/mlx4/main.c
+++ b/drivers/net/mlx4/main.c
@@ -154,6 +154,7 @@ static int __devinit mlx4_dev_cap(struct mlx4_dev *dev, struct mlx4_dev_cap *dev
 	dev->caps.reserved_uars	     = dev_cap->reserved_uars;
 	dev->caps.reserved_pds	     = dev_cap->reserved_pds;
 	dev->caps.mtt_entry_sz	     = MLX4_MTT_ENTRY_PER_SEG * dev_cap->mtt_entry_sz;
+	dev->caps.max_msg_sz         = dev_cap->max_msg_sz;
 	dev->caps.page_size_cap	     = ~(u32) (dev_cap->min_page_sz - 1);
 	dev->caps.flags		     = dev_cap->flags;
 	dev->caps.stat_rate_support  = dev_cap->stat_rate_support;
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index b372f5910fc154247e1f1a08b812e606309139e3..8209387ee854e5972ad47b3ac19423aa87c6f20b 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -172,6 +172,7 @@ struct mlx4_caps {
 	int			num_pds;
 	int			reserved_pds;
 	int			mtt_entry_sz;
+	u32			max_msg_sz;
 	u32			page_size_cap;
 	u32			flags;
 	u16			stat_rate_support;