[dpdk-dev] [PATCH] net/mlx4: fix Tx doorbell register unmap

[Yongseok Koh]

If rdma-core library doesn't support remapping UAR registers, the register
shouldn't be unmapped on device stop.

Fixes: 0203d33a1059 ("net/mlx4: support secondary process")

Signed-off-by: Yongseok Koh <ys...@mellanox.com>
---
 drivers/net/mlx4/mlx4.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 252658fc6a..9bca0ce9cd 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -314,8 +314,10 @@ static void
 mlx4_dev_stop(struct rte_eth_dev *dev)
 {
        struct mlx4_priv *priv = dev->data->dev_private;
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
        const size_t page_size = sysconf(_SC_PAGESIZE);
        int i;
+#endif
 
        if (!priv->started)
                return;
@@ -329,6 +331,7 @@ mlx4_dev_stop(struct rte_eth_dev *dev)
        mlx4_flow_sync(priv, NULL);
        mlx4_rxq_intr_disable(priv);
        mlx4_rss_deinit(priv);
+#ifdef HAVE_IBV_MLX4_UAR_MMAP_OFFSET
        for (i = 0; i != dev->data->nb_tx_queues; ++i) {
                struct txq *txq;
 
@@ -338,6 +341,7 @@ mlx4_dev_stop(struct rte_eth_dev *dev)
                munmap((void *)RTE_ALIGN_FLOOR((uintptr_t)txq->msq.db,
                                               page_size), page_size);
        }
+#endif
 }
 
 /**
-- 
2.11.0