[PATCH AUTOSEL 5.0 012/262] net/mlx5e: Fix access to non-existing receive queue
From: Sasha Levin <sashal@kernel.org>
Date: 2019-03-27 19:33:59
Also in:
linux-rdma, lkml, stable
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Tariq Toukan <redacted>
[ Upstream commit c475e11e82d16133304321bae285c5c1d4cfc856 ]
In case number of channels is changed while interface is down,
RSS indirection table is mistakenly not modified accordingly,
causing access to out-of-range non-existing object.
Fix by updating the RSS indireciton table also in the early
return flow of interface down.
Fixes: fb35c534b788 ("net/mlx5e: Fix NULL pointer derefernce in set channels error flow")
Fixes: bbeb53b8b2c9 ("net/mlx5e: Move RSS params to a dedicated struct")
Reported-by: Or Gerlitz <redacted>
Tested-by: Maria Pasechnik <redacted>
Signed-off-by: Tariq Toukan <redacted>
Reviewed-by: Eran Ben Elisha <redacted>
Signed-off-by: Saeed Mahameed <redacted>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 47233b9a4f81..e6099f51d25f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c@@ -357,6 +357,9 @@ int mlx5e_ethtool_set_channels(struct mlx5e_priv *priv, if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) { priv->channels.params = new_channels.params; + if (!netif_is_rxfh_configured(priv->netdev)) + mlx5e_build_default_indir_rqt(priv->rss_params.indirection_rqt, + MLX5E_INDIR_RQT_SIZE, count); goto out; }
--
2.19.1