1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/mlx4/cmd.c b/drivers/net/mlx4/cmd.c
index b540820e9c25..db49051b97b1 100644
--- a/drivers/net/mlx4/cmd.c
+++ b/drivers/net/mlx4/cmd.c
@@ -184,6 +184,13 @@ static int mlx4_cmd_post(struct mlx4_dev *dev, u64 in_param, u64 out_param,
                                                (event ? (1 << HCR_E_BIT) : 0)   |
                                                (op_modifier << HCR_OPMOD_SHIFT) |
                                                op),                       hcr + 6);
+
+        /*
+         * Make sure that our HCR writes don't get mixed in with
+         * writes from another CPU starting a FW command.
+         */
+        mmiowb();
+
         cmd->toggle = cmd->toggle ^ 1;
 
         ret = 0;