[dpdk-dev] [v2] vdpa/mlx5: fix event queue number query

[Xueming Li]

With latest rte api, vdpa example failed on vq setup, the api to get
event queue of specified core failed.

After
commit 67ae5936c4fc36 ("eal: fix lcore accessors for non-EAL threads"),
code of "vhost-event" thread to get current cpu id returns -1.

On the other hand, internal api devx_query_eqn expects index of event
queue vectors, no need to use cpu id. As the doorbell handling thread is
per device, it's sufficient to use default event queue.

This patch uses the default id(0) as event queue index.

Fixes: 8395927cdfaf ("vdpa/mlx5: prepare HW queues")

Signed-off-by: Xueming Li <xuemingl at mellanox.com>
Acked-by: Matan Azrad <matan at mellanox.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa_event.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_event.c b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
index 13ad43611e..159831920f 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_event.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
@@ -51,12 +51,9 @@ mlx5_vdpa_event_qp_global_release(struct mlx5_vdpa_priv *priv)
 static int
 mlx5_vdpa_event_qp_global_prepare(struct mlx5_vdpa_priv *priv)
 {
-	uint32_t lcore;
-
 	if (priv->eventc)
 		return 0;
-	lcore = (uint32_t)rte_lcore_to_cpu_id(-1);
-	if (mlx5_glue->devx_query_eqn(priv->ctx, lcore, &priv->eqn)) {
+	if (mlx5_glue->devx_query_eqn(priv->ctx, 0, &priv->eqn)) {
 		rte_errno = errno;
 		DRV_LOG(ERR, "Failed to query EQ number %d.", rte_errno);
 		return -1;
-- 
2.17.1