net/mlx4_core: Fix wrong mask applied on EQ numbers in the wrapper

Currently the  mask is wrongly set in the MAP_EQ wrapper, fix that.
Without the fix any EQ number above 511 is mapped to one below 511.

Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/eq.c b/drivers/net/ethernet/mellanox/mlx4/eq.c
index 251ae2f..8e3123a 100644
--- a/drivers/net/ethernet/mellanox/mlx4/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/eq.c
@@ -771,7 +771,7 @@
 	struct mlx4_slave_event_eq_info *event_eq =
 		priv->mfunc.master.slave_state[slave].event_eq;
 	u32 in_modifier = vhcr->in_modifier;
-	u32 eqn = in_modifier & 0x1FF;
+	u32 eqn = in_modifier & 0x3FF;
 	u64 in_param =  vhcr->in_param;
 	int err = 0;
 	int i;