[PATCH rdma-rc 01/10] RDMA/mlx5: Initiate dropless RQ for RAW Ethernet functions

From: Leon Romanovsky <leon@kernel.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Maher Sanalla <msanalla@nvidia.com>,
	linux-rdma@vger.kernel.org, Maor Gottlieb <maorg@nvidia.com>
Subject: [PATCH rdma-rc 01/10] RDMA/mlx5: Initiate dropless RQ for RAW Ethernet functions
Date: Mon,  5 Jun 2023 13:33:17 +0300	[thread overview]
Message-ID: <2e9d386785043d48c38711826eb910315c1de141.1685960567.git.leon@kernel.org> (raw)
In-Reply-To: <cover.1685960567.git.leon@kernel.org>

From: Maher Sanalla <msanalla@nvidia.com>

Delay drop data is initiated for PFs that have the capability of
rq_delay_drop and are in roce profile.

However, PFs with RAW ethernet profile do not initiate delay drop data
on function load, causing kernel panic if delay drop struct members are
accessed later on in case a dropless RQ is created.

Thus, stage the delay drop initialization as part of RAW ethernet
PF loading process.

Fixes: b5ca15ad7e61 ("IB/mlx5: Add proper representors support")
Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 drivers/infiniband/hw/mlx5/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 5d45de223c43..f0b394ed7452 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -4275,6 +4275,9 @@ const struct mlx5_ib_profile raw_eth_profile = {
 	STAGE_CREATE(MLX5_IB_STAGE_POST_IB_REG_UMR,
 		     mlx5_ib_stage_post_ib_reg_umr_init,
 		     NULL),
+	STAGE_CREATE(MLX5_IB_STAGE_DELAY_DROP,
+		     mlx5_ib_stage_delay_drop_init,
+		     mlx5_ib_stage_delay_drop_cleanup),
 	STAGE_CREATE(MLX5_IB_STAGE_RESTRACK,
 		     mlx5_ib_restrack_init,
 		     NULL),
-- 
2.40.1

