linux-kernel - [PATCH AUTOSEL 5.15 111/153] net/mlx5: Apply rate-limiting to high temperature warning

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Message-Id: <20250505231320.2695319-111-sashal@kernel.org>
Date: Mon,  5 May 2025 19:12:38 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Shahar Shitrit <shshitrit@...dia.com>,
	Tariq Toukan <tariqt@...dia.com>,
	Mateusz Polchlopek <mateusz.polchlopek@...el.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	saeedm@...dia.com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	pabeni@...hat.com,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 111/153] net/mlx5: Apply rate-limiting to high temperature warning

From: Shahar Shitrit <shshitrit@...dia.com>

[ Upstream commit 9dd3d5d258aceb37bdf09c8b91fa448f58ea81f0 ]

Wrap the high temperature warning in a temperature event with
a call to net_ratelimit() to prevent flooding the kernel log
with repeated warning messages when temperature exceeds the
threshold multiple times within a short duration.

Signed-off-by: Shahar Shitrit <shshitrit@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
Reviewed-by: Mateusz Polchlopek <mateusz.polchlopek@...el.com>
Link: https://patch.msgid.link/20250213094641.226501-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/events.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/events.c b/drivers/net/ethernet/mellanox/mlx5/core/events.c
index 080aee3e3f9bb..15d90d68b1ffd 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/events.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/events.c
@@ -166,9 +166,10 @@ static int temp_warn(struct notifier_block *nb, unsigned long type, void *data)
 	value_lsb &= 0x1;
 	value_msb = be64_to_cpu(eqe->data.temp_warning.sensor_warning_msb);
 
-	mlx5_core_warn(events->dev,
-		       "High temperature on sensors with bit set %llx %llx",
-		       value_msb, value_lsb);
+	if (net_ratelimit())
+		mlx5_core_warn(events->dev,
+			       "High temperature on sensors with bit set %llx %llx",
+			       value_msb, value_lsb);
 
 	return NOTIFY_OK;
 }
-- 
2.39.5