4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gil Rockah <gilr@xxxxxxxxxxxx>
[ Upstream commit 0bbcc0a8fc394d01988fe0263ccf7fddb77a12c3 ]
When trying to do interface down or changing interface configuration
under heavy traffic, some of the adaptive moderation corner cases can
occur and leave a WARN_ONCE call trace in the kernel log.
Those WARN_ONCE are meant for debug only, and should have been inserted
only under debug. We avoid such call traces by removing those WARN_ONCE.
Fixes: cb3c7fd4f839 ("net/mlx5e: Support adaptive RX coalescing")
Signed-off-by: Gil Rockah <gilr@xxxxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx_am.c
@@ -109,7 +109,6 @@ static bool mlx5e_am_on_top(struct mlx5e
switch (am->tune_state) {
case MLX5E_AM_PARKING_ON_TOP:
case MLX5E_AM_PARKING_TIRED:
- WARN_ONCE(true, "mlx5e_am_on_top: PARKING\n");
return true;
case MLX5E_AM_GOING_RIGHT:
return (am->steps_left > 1) && (am->steps_right == 1);
@@ -123,7 +122,6 @@ static void mlx5e_am_turn(struct mlx5e_r
switch (am->tune_state) {
case MLX5E_AM_PARKING_ON_TOP:
case MLX5E_AM_PARKING_TIRED:
- WARN_ONCE(true, "mlx5e_am_turn: PARKING\n");
break;
case MLX5E_AM_GOING_RIGHT:
am->tune_state = MLX5E_AM_GOING_LEFT;
@@ -144,7 +142,6 @@ static int mlx5e_am_step(struct mlx5e_rx
switch (am->tune_state) {
case MLX5E_AM_PARKING_ON_TOP:
case MLX5E_AM_PARKING_TIRED:
- WARN_ONCE(true, "mlx5e_am_step: PARKING\n");
break;
case MLX5E_AM_GOING_RIGHT:
if (am->profile_ix == (MLX5E_PARAMS_AM_NUM_PROFILES - 1))
@@ -282,10 +279,8 @@ static void mlx5e_am_calc_stats(struct m
u32 delta_us = ktime_us_delta(end->time, start->time);
unsigned int npkts = end->pkt_ctr - start->pkt_ctr;
- if (!delta_us) {
- WARN_ONCE(true, "mlx5e_am_calc_stats: delta_us=0\n");
+ if (!delta_us)
return;
- }
curr_stats->ppms = (npkts * USEC_PER_MSEC) / delta_us;
curr_stats->epms = (MLX5E_AM_NEVENTS * USEC_PER_MSEC) / delta_us;
--
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