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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Eli Britstein <elibr@mellanox.com>,
	Maor Gottlieb <maorg@mellanox.com>,
	Saeed Mahameed <saeedm@mellanox.com>,
	Sasha Levin <sashal@kernel.org>,
	netdev@vger.kernel.org, linux-rdma@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 243/671] net/mlx5: Fix multiple updates of steering rules in parallel
Date: Thu, 16 Jan 2020 11:52:32 -0500
Message-ID: <20200116165940.10720-126-sashal@kernel.org> (raw)
In-Reply-To: <20200116165940.10720-1-sashal@kernel.org>

From: Eli Britstein <elibr@mellanox.com>

[ Upstream commit 6237634d8fcc65c9e3348382910e7cdb15084c68 ]

There might be a condition where the fte found is not active yet. In
this case we should not use it, but continue to search for another, or
allocate a new one.

Fixes: bd71b08ec2ee ("net/mlx5: Support multiple updates of steering rules in parallel")
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 82a53317285d..b16e0f45d28c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -469,6 +469,7 @@ static void del_hw_fte(struct fs_node *node)
 			mlx5_core_warn(dev,
 				       "flow steering can't delete fte in index %d of flow group id %d\n",
 				       fte->index, fg->id);
+		node->active = 0;
 	}
 }
 
@@ -1597,6 +1598,11 @@ lookup_fte_locked(struct mlx5_flow_group *g,
 		fte_tmp = NULL;
 		goto out;
 	}
+	if (!fte_tmp->node.active) {
+		tree_put_node(&fte_tmp->node);
+		fte_tmp = NULL;
+		goto out;
+	}
 
 	nested_down_write_ref_node(&fte_tmp->node, FS_LOCK_CHILD);
 out:
-- 
2.20.1


  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116165940.10720-1-sashal@kernel.org>
2020-01-16 16:50 ` [PATCH AUTOSEL 4.19 123/671] IB/iser: Pass the correct number of entries for dma mapped SGL Sasha Levin
2020-01-16 16:50 ` [PATCH AUTOSEL 4.19 126/671] IB/mlx5: Don't override existing ip_protocol Sasha Levin
2020-01-16 16:50 ` [PATCH AUTOSEL 4.19 133/671] net/mlx5: Take lock with IRQs disabled to avoid deadlock Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 167/671] iw_cxgb4: use tos when importing the endpoint Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 168/671] iw_cxgb4: use tos when finding ipv6 routes Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 178/671] RDMA/mlx5: Fix memory leak in case we fail to add an IB device Sasha Levin
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 201/671] net/mlx5: Delete unused FPGA QPN variable Sasha Levin
2020-01-16 16:52 ` Sasha Levin [this message]
2020-01-16 16:52 ` [PATCH AUTOSEL 4.19 244/671] net/mlx5e: IPoIB, Fix RX checksum statistics update Sasha Levin

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