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Commit f1e6b114 authored by Eugenia Emantayev's avatar Eugenia Emantayev Committed by Greg Kroah-Hartman
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net/mlx4_en: Fix bad WQE issue 



commit 6496bbf0ec481966ef9ffe5b6660d8d1b55c60cc upstream.

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>
Signed-off-by: default avatarSumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 0a007f74

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

+7 −1
Original line number Diff line number Diff line
@@ -439,8 +439,14 @@ int mlx4_en_activate_rx_rings(struct mlx4_en_priv *priv) 
		ring->cqn = priv->rx_cq[ring_ind]->mcq.cqn;



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

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