[for-next 04/14] net/mlx5e: Wait for FPGA command responses with a timeout

[Saeed Mahameed]

From: Aviad Yehezkel <avia...@mellanox.com>

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 <avia...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c 
b/drivers/net/ethernet/mellanox/mlx5/core/fpga/ipsec.c
index 35d0e33381ca..95f9c5a8619b 100644
--- 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 mlx5_core_dev 
*mdev,
 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)
-- 
2.14.3