[dpdk-stable] [PATCH] net/mlx5: fix LRO dependency to include DV flow

[Dekel Peled]

Rx queue for LRO is created using DevX. Flows created on this queue
must use the DV flow engine.

This patch adds check of dv_flow_en=1 when configuring LRO support
on device spawn.
Documentation is updated accordingly.

Fixes: 175f1c21d033 ("net/mlx5: check conditions to enable LRO")
Cc: stable at dpdk.org

Signed-off-by: Dekel Peled <dekelp at mellanox.com>
---
 doc/guides/nics/mlx5.rst | 2 +-
 drivers/net/mlx5/mlx5.c  | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 600cea7..45fa968 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -203,7 +203,7 @@ Limitations
 
 - LRO:
 
-  - Requires DevX to be enabled.
+  - Requires DevX and DV flow to be enabled.
   - KEEP_CRC offload cannot be supported with LRO.
   - The first mbuf length, without head-room,  must be big enough to include the
     TCP header (122B).
diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index b99c5a9..5977d06 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -2033,7 +2033,8 @@ struct mlx5_dev_spawn_data {
 		if (priv->counter_fallback)
 			DRV_LOG(INFO, "Use fall-back DV counter management\n");
 		/* Check for LRO support. */
-		if (config.dest_tir && config.hca_attr.lro_cap) {
+		if (config.dest_tir && config.hca_attr.lro_cap &&
+		    config.dv_flow_en) {
 			/* TBD check tunnel lro caps. */
 			config.lro.supported = config.hca_attr.lro_cap;
 			DRV_LOG(DEBUG, "Device supports LRO");
-- 
1.8.3.1