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Revert "net/mlx5e: E-Switch, Initialize eswitch only if eswitch manager"

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[ Upstream commit 4e046de0f50e04acd48eb373d6a9061ddf014e0c ]

This reverts commit 5f5991f36dce1e69dd8bd7495763eec2e28f08e7.

With the original commit, eswitch instance will not be initialized for
a function which is vport group manager but not eswitch manager such as
host PF on SmartNIC (BlueField) card. This will result in a kernel crash
when such a vport group manager is trying to access vports in its group.
E.g, PF vport manager (not eswitch manager) tries to configure the MAC
of its VF vport, a kernel trace will happen similar as bellow:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 ...
 RIP: 0010:mlx5_eswitch_get_vport_config+0xc/0x180 [mlx5_core]
 ...

Fixes: 5f5991f36dce ("net/mlx5e: E-Switch, Initialize eswitch only if eswitch manager")
Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reported-by: Yuval Avnery <yuvalav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bodong Wang 2019-01-13 22:47:26 -06:00 committed by Greg Kroah-Hartman
parent d3ee1e685f
commit eb31b906dc
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
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@ -1607,7 +1607,7 @@ int mlx5_eswitch_init(struct mlx5_core_dev *dev)
int vport_num;
int err;
if (!MLX5_ESWITCH_MANAGER(dev))
if (!MLX5_VPORT_MANAGER(dev))
return 0;
esw_info(dev,
@ -1680,7 +1680,7 @@ abort:
void mlx5_eswitch_cleanup(struct mlx5_eswitch *esw)
{
if (!esw || !MLX5_ESWITCH_MANAGER(esw->dev))
if (!esw || !MLX5_VPORT_MANAGER(esw->dev))
return;
esw_info(esw->dev, "cleanup\n");