Saeed Mahameed 407e17b1a6 net/mlx5e: XDP, fix redirect resources availability check ... Currently mlx5 driver creates xdp redirect hw queues unconditionally on netdevice open, This is great until someone starts redirecting XDP traffic via ndo_xdp_xmit on mlx5 device and changes the device configuration at the same time, this might cause crashes, since the other device's napi is not aware of the mlx5 state change (resources un-availability). To fix this we must synchronize with other devices napi's on the system. Added a new flag under mlx5e_priv to determine XDP TX resources are available, set/clear it up when necessary and use synchronize_rcu() when the flag is turned off, so other napi's are in-sync with it, before we actually cleanup the hw resources. The flag is tested prior to committing to transmit on mlx5e_xdp_xmit, and it is sufficient to determine if it safe to transmit or not. The other two internal flags (MLX5E_STATE_OPENED and MLX5E_SQ_STATE_ENABLED) become unnecessary. Thus, they are removed from data path. Fixes: 58b99ee3e3 ("net/mlx5e: Add support for XDP_REDIRECT in device-out side") Reported-by: Toke Høiland-Jørgensen <toke@redhat.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>		2019-02-13 15:40:51 -08:00
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mlx4	net/mlx4_en: Force CHECKSUM_NONE for short ethernet frames	2019-02-12 12:26:21 -05:00
mlx5/core	net/mlx5e: XDP, fix redirect resources availability check	2019-02-13 15:40:51 -08:00
mlxfw
mlxsw	mlxsw: spectrum_switchdev: Do not treat static FDB entries as sticky	2019-01-18 15:12:16 -08:00
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