linux

iv/linux

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Maxim Mikityanskiy 5b759bf2f9 net/mlx5e: Ring the TX doorbell on DMA errors

TX doorbells may be postponed, because sometimes the driver knows that
another packet follows (for example, when xmit_more is true, or when a
MPWQE session is closed before transmitting a packet).

However, the DMA mapping may fail for the next packet, in which case a
new WQE is not posted, the doorbell isn't updated either, and the
transmission of the previous packet will be delayed indefinitely.

This commit fixes the described rare error flow by posting a NOP and
ringing the doorbell on errors to flush all the previous packets. The
MPWQE session is closed before that. DMA mapping in the MPWQE flow is
moved to the beginning of mlx5e_sq_xmit_mpwqe, because empty sessions
are not allowed. Stop room always has enough space for a NOP, because
the actual TX WQE is not posted.

Fixes: e586b3b0baee ("net/mlx5: Ethernet Datapath files")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

2022-07-06 16:11:56 -07:00

mlx4

Networking fixes for 5.19-rc2, including fixes from bpf and netfilter.

2022-06-09 12:06:52 -07:00

mlx5/core

net/mlx5e: Ring the TX doorbell on DMA errors

2022-07-06 16:11:56 -07:00

mlxbf_gige

net/mlxbf_gige: use eth_zero_addr() to clear mac address

2022-05-17 11:23:58 +02:00

mlxfw

devlink: Reduce struct devlink exposure