From: Qian Cai <cai@lca.pw>
Date: Mon, 22 Jul 2019 14:34:42 -0400
Subject: net/mlx5: fix -Wtype-limits compilation warnings
Patch-mainline: v5.4-rc1
Git-commit: 0470e5e38c9d97e7ce1e804cd54cf59accdf3ac2
References: jsc#SLE-8464

The commit b9a7ba556207 ("net/mlx5: Use event mask based on device
capabilities") introduced a few compilation warnings due to it bumps
MLX5_EVENT_TYPE_MAX from 0x27 to 0x100 which is always greater than
an "struct {mlx5_eqe|mlx5_nb}.type" that is an "u8".

drivers/net/ethernet/mellanox/mlx5/core/eq.c: In function
'mlx5_eq_notifier_register':
drivers/net/ethernet/mellanox/mlx5/core/eq.c:948:21: warning: comparison
is always false due to limited range of data type [-Wtype-limits]
  if (nb->event_type >= MLX5_EVENT_TYPE_MAX)
                     ^~
drivers/net/ethernet/mellanox/mlx5/core/eq.c: In function
'mlx5_eq_notifier_unregister':
drivers/net/ethernet/mellanox/mlx5/core/eq.c:959:21: warning: comparison
is always false due to limited range of data type [-Wtype-limits]
  if (nb->event_type >= MLX5_EVENT_TYPE_MAX)

Fix them by removing unnecessary checkings.

Fixes: b9a7ba556207 ("net/mlx5: Use event mask based on device capabilities")
Signed-off-by: Qian Cai <cai@lca.pw>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/eq.c |   12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -215,11 +215,7 @@ static int mlx5_eq_async_int(struct noti
 		 */
 		dma_rmb();
 
-		if (likely(eqe->type < MLX5_EVENT_TYPE_MAX))
-			atomic_notifier_call_chain(&eqt->nh[eqe->type], eqe->type, eqe);
-		else
-			mlx5_core_warn_once(dev, "notifier_call_chain is not setup for eqe: %d\n", eqe->type);
-
+		atomic_notifier_call_chain(&eqt->nh[eqe->type], eqe->type, eqe);
 		atomic_notifier_call_chain(&eqt->nh[MLX5_EVENT_TYPE_NOTIFY_ANY], eqe->type, eqe);
 
 		++eq->cons_index;
@@ -945,9 +941,6 @@ int mlx5_eq_notifier_register(struct mlx
 {
 	struct mlx5_eq_table *eqt = dev->priv.eq_table;
 
-	if (nb->event_type >= MLX5_EVENT_TYPE_MAX)
-		return -EINVAL;
-
 	return atomic_notifier_chain_register(&eqt->nh[nb->event_type], &nb->nb);
 }
 EXPORT_SYMBOL(mlx5_eq_notifier_register);
@@ -956,9 +949,6 @@ int mlx5_eq_notifier_unregister(struct m
 {
 	struct mlx5_eq_table *eqt = dev->priv.eq_table;
 
-	if (nb->event_type >= MLX5_EVENT_TYPE_MAX)
-		return -EINVAL;
-
 	return atomic_notifier_chain_unregister(&eqt->nh[nb->event_type], &nb->nb);
 }
 EXPORT_SYMBOL(mlx5_eq_notifier_unregister);