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Commit 6496bbf0 authored by Eugenia Emantayev's avatar Eugenia Emantayev Committed by David S. Miller
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net/mlx4_en: Fix bad WQE issue 



Single send WQE in RX buffer should be stamped with software
ownership in order to prevent the flow of QP in error in FW
once UPDATE_QP is called.

Fixes: 9f519f68 ('mlx4_en: Not using Shared Receive Queues')
Signed-off-by: default avatarEugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3b01fe7f

drivers/net/ethernet/mellanox/mlx4/en_rx.c

+7 −1
Original line number Original line Diff line number Diff line
@@ -445,8 +445,14 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv) 
		ring->cqn = priv->rx_cq[ring_ind]->mcq.cqn;

		ring->cqn = priv->rx_cq[ring_ind]->mcq.cqn;





		ring->stride = stride;

		ring->stride = stride;

		if (ring->stride <= TXBB_SIZE)

		if (ring->stride <= TXBB_SIZE) {

			/* Stamp first unused send wqe */

			__be32 *ptr = (__be32 *)ring->buf;

			__be32 stamp = cpu_to_be32(1 << STAMP_SHIFT);

			*ptr = stamp;

			/* Move pointer to start of rx section */

			ring->buf += TXBB_SIZE;

			ring->buf += TXBB_SIZE;

		}





		ring->log_stride = ffs(ring->stride) - 1;

		ring->log_stride = ffs(ring->stride) - 1;

		ring->buf_size = ring->size * ring->stride;

		ring->buf_size = ring->size * ring->stride;