2d4b646613
Fix a race between BlueFlame flow and stamping in post send flow. Example: SW: Build WQE 0 on the TX buffer, except the ownership bit SW: Set ownership for WQE 0 on the TX buffer SW: Ring doorbell for WQE 0 SW: Build WQE 1 on the TX buffer, except the ownership bit SW: Set ownership for WQE 1 on the TX buffer HW: Read WQE 0 and then WQE 1, before doorbell was rung/BF was done for WQE 1 HW: Produce CQEs for WQE 0 and WQE 1 SW: Process the CQEs, and stamp WQE 0 and WQE 1 accordingly (on the TX buffer) SW: Copy WQE 1 from the TX buffer to the BF register - ALREADY STAMPED! HW: CQE error with index 0xFFFF - the BF WQE's control segment is STAMPED, so the BF index is 0xFFFF. Error: Invalid Opcode. As a result QP enters the error state and no traffic can be sent. Solution: When stamping - do not stamp last completed wqe. Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com> Signed-off-by: Amir Vadai <amirv@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| mlx4 | ||
| mlx5/core | ||
| Kconfig | ||
| Makefile | ||