From: Leon Romanovsky <leonro@mellanox.com>
Date: Sun, 24 Jun 2018 11:23:46 +0300
Subject: net/mlx5: Rate limit errors in command interface
Patch-mainline: v4.19-rc1
Git-commit: b30408d7a38356e4d6b4f913686b25401fae386c
References: bsc#1103990 FATE#326006
Any error status returned by FW will trigger a print similar to the
following error message in the dmesg.
[ 55.884355] mlx5_core 0000:00:04.0: mlx5_cmd_check:712:(pid 555):
ALLOC_UAR(0x802) op_mod(0x0) failed, status limits exceeded(0x8),
syndrome (0x0)
Those prints are extremely valuable to diagnose issues with running system
and it is important to keep them. However, not-so-careful user can trigger
endless number of such prints by depleting HW resources and will spam
dmesg.
Rate limiting of such messages solves this issue.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 11 ++++-------
drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h | 6 ++++++
2 files changed, 10 insertions(+), 7 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -712,13 +712,10 @@ static int mlx5_cmd_check(struct mlx5_co
uid = MLX5_GET(mbox_in, in, uid);
if (!uid && opcode != MLX5_CMD_OP_DESTROY_MKEY)
- mlx5_core_err(dev,
- "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
- mlx5_command_str(opcode),
- opcode, op_mod,
- cmd_status_str(status),
- status,
- syndrome);
+ mlx5_core_err_rl(dev,
+ "%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
+ mlx5_command_str(opcode), opcode, op_mod,
+ cmd_status_str(status), status, syndrome);
else
mlx5_core_dbg(dev,
"%s(0x%x) op_mod(0x%x) failed, status %s(0x%x), syndrome (0x%x)\n",
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -66,6 +66,12 @@ do { \
__func__, __LINE__, current->pid, \
##__VA_ARGS__)
+#define mlx5_core_err_rl(__dev, format, ...) \
+ dev_err_ratelimited(&(__dev)->pdev->dev, \
+ "%s:%d:(pid %d): " format, \
+ __func__, __LINE__, current->pid, \
+ ##__VA_ARGS__)
+
#define mlx5_core_warn(__dev, format, ...) \
dev_warn(&(__dev)->pdev->dev, "%s:%d:(pid %d): " format, \
__func__, __LINE__, current->pid, \