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-rw-r--r--drivers/net/mlx4/cmd.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/mlx4/cmd.c b/drivers/net/mlx4/cmd.c
index b540820e9c2..db49051b97b 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;