From: Aviad Yehezkel <aviadye@mellanox.com>
Date: Sun, 11 Feb 2018 17:12:44 +0200
Subject: net/mlx5e: Wait for FPGA command responses with a timeout
Patch-mainline: v4.17-rc1
Git-commit: ef927a9c168722c4ab5e40838d7fe6b63f978763
References: bsc#1103990 FATE#326006

Generally, FPGA IPSec commands must always complete.
We want to wait for one minute for them to complete gracefully also
when killing a process.

Signed-off-by: Aviad Yehezkel <aviadye@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
@@ -39,6 +39,7 @@
 #include "fpga/core.h"
 
 #define SBU_QP_QUEUE_SIZE 8
+#define MLX5_FPGA_IPSEC_CMD_TIMEOUT_MSEC	(60 * 1000)
 
 enum mlx5_ipsec_response_syndrome {
 	MLX5_IPSEC_RESPONSE_SUCCESS = 0,
@@ -217,12 +218,14 @@ void *mlx5_fpga_ipsec_sa_cmd_exec(struct
 int mlx5_fpga_ipsec_sa_cmd_wait(void *ctx)
 {
 	struct mlx5_ipsec_command_context *context = ctx;
+	unsigned long timeout =
+		msecs_to_jiffies(MLX5_FPGA_IPSEC_CMD_TIMEOUT_MSEC);
 	int res;
 
-	res = wait_for_completion_killable(&context->complete);
-	if (res) {
+	res = wait_for_completion_timeout(&context->complete, timeout);
+	if (!res) {
 		mlx5_fpga_warn(context->dev, "Failure waiting for IPSec command response\n");
-		return -EINTR;
+		return -ETIMEDOUT;
 	}
 
 	if (context->status == MLX5_FPGA_IPSEC_SACMD_COMPLETE)