diff options
| author |   Eugenia Emantayev <eugenia@mellanox.com> | 2016-12-29 18:37:10 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-12-29 14:17:40 -0500 |
| commit | 6496bbf0ec481966ef9ffe5b6660d8d1b55c60cc (patch) | |
| tree | be7e3ea139a50c6981f9176d7b31c12128d47370 /drivers/net | |
| parent | net/mlx4_core: Use-after-free causes a resource leak in flow-steering detach (diff) | |
| download | linux-dev-6496bbf0ec481966ef9ffe5b6660d8d1b55c60cc.tar.xz linux-dev-6496bbf0ec481966ef9ffe5b6660d8d1b55c60cc.zip | |
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: 9f519f68cfff ('mlx4_en: Not using Shared Receive Queues')
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_rx.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 3c37e216bbf3..eac527e25ec9 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -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->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; |