linux-kernel - [PATCH 5.4 26/62] net/mlx5: Fix return value from tracer initialization

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Message-Id: <20210816125429.087053624@linuxfoundation.org>
Date:   Mon, 16 Aug 2021 15:01:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Aya Levin <ayal@...dia.com>,
        Moshe Shemesh <moshe@...dia.com>,
        Tariq Toukan <tariqt@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 26/62] net/mlx5: Fix return value from tracer initialization

From: Aya Levin <ayal@...dia.com>

[ Upstream commit bd37c2888ccaa5ceb9895718f6909b247cc372e0 ]

Check return value of mlx5_fw_tracer_start(), set error path and fix
return value of mlx5_fw_tracer_init() accordingly.

Fixes: c71ad41ccb0c ("net/mlx5: FW tracer, events handling")
Signed-off-by: Aya Levin <ayal@...dia.com>
Reviewed-by: Moshe Shemesh <moshe@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c  | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
index eb2e57ff08a6..dc36b0db3722 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c
@@ -1017,12 +1017,19 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
 	MLX5_NB_INIT(&tracer->nb, fw_tracer_event, DEVICE_TRACER);
 	mlx5_eq_notifier_register(dev, &tracer->nb);
 
-	mlx5_fw_tracer_start(tracer);
-
+	err = mlx5_fw_tracer_start(tracer);
+	if (err) {
+		mlx5_core_warn(dev, "FWTracer: Failed to start tracer %d\n", err);
+		goto err_notifier_unregister;
+	}
 	return 0;
 
+err_notifier_unregister:
+	mlx5_eq_notifier_unregister(dev, &tracer->nb);
+	mlx5_core_destroy_mkey(dev, &tracer->buff.mkey);
 err_dealloc_pd:
 	mlx5_core_dealloc_pd(dev, tracer->buff.pdn);
+	cancel_work_sync(&tracer->read_fw_strings_work);
 	return err;
 }
 
-- 
2.30.2