From: Caleb Sander Mateos <csander@purestorage.com>
Date: Wed, 23 Oct 2024 20:51:12 +0000 (-0600)
Subject: mlx5: simplify EQ interrupt polling logic
X-Git-Tag: v6.13-rc1~135^2~202
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77693e6c140aff6957d1046475fe69f45fdb1583;p=thirdparty%2Fkernel%2Flinux.git

mlx5: simplify EQ interrupt polling logic

Use a while loop in mlx5_eq_comp_int() and mlx5_eq_async_int() to
clarify the EQE polling logic. This consolidates the next_eqe_sw() calls
for the first and subequent iterations. It also avoids a goto. Turn the
num_eqes < MLX5_EQ_POLLING_BUDGET check into a break condition.

Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241023205113.255866-1-csander@purestorage.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 68cb86b37e561..859dcf09b7700 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -116,11 +116,7 @@ static int mlx5_eq_comp_int(struct notifier_block *nb,
 	int num_eqes = 0;
 	u32 cqn = -1;
 
-	eqe = next_eqe_sw(eq);
-	if (!eqe)
-		goto out;
-
-	do {
+	while ((eqe = next_eqe_sw(eq))) {
 		struct mlx5_core_cq *cq;
 
 		/* Make sure we read EQ entry contents after we've
@@ -142,9 +138,10 @@ static int mlx5_eq_comp_int(struct notifier_block *nb,
 
 		++eq->cons_index;
 
-	} while ((++num_eqes < MLX5_EQ_POLLING_BUDGET) && (eqe = next_eqe_sw(eq)));
+		if (++num_eqes >= MLX5_EQ_POLLING_BUDGET)
+			break;
+	}
 
-out:
 	eq_update_ci(eq, 1);
 
 	if (cqn != -1)
@@ -215,11 +212,7 @@ static int mlx5_eq_async_int(struct notifier_block *nb,
 	recovery = action == ASYNC_EQ_RECOVER;
 	mlx5_eq_async_int_lock(eq_async, recovery, &flags);
 
-	eqe = next_eqe_sw(eq);
-	if (!eqe)
-		goto out;
-
-	do {
+	while ((eqe = next_eqe_sw(eq))) {
 		/*
 		 * Make sure we read EQ entry contents after we've
 		 * checked the ownership bit.
@@ -231,9 +224,10 @@ static int mlx5_eq_async_int(struct notifier_block *nb,
 
 		++eq->cons_index;
 
-	} while ((++num_eqes < MLX5_EQ_POLLING_BUDGET) && (eqe = next_eqe_sw(eq)));
+		if (++num_eqes >= MLX5_EQ_POLLING_BUDGET)
+			break;
+	}
 
-out:
 	eq_update_ci(eq, 1);
 	mlx5_eq_async_int_unlock(eq_async, recovery, &flags);