[PATCH 04/18] net/mlx5: Use exact encap header size for the FW input buffer

[Talat Batheesh]

From: Or Gerlitz <ogerlitz at mellanox.com>

BugLink: https://bugs.launchpad.net/ubuntu/1668019

The current code is allocating the max encap size supported by
the firmware and not the size requested by the caller, fix that.

Also, spare a warning when the size of the encapsulation headers
is bigger from what is supported by the firmware.

Signed-off-by: Or Gerlitz <ogerlitz at mellanox.com>
Reviewed-by: Hadar Hen Zion <hadarh at mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm at mellanox.com>
(cherry picked from commit 073ff3c8e6acdd6bae91a037e6f2d0edeed4165d)
Signed-off-by: Talat Batheesh <talatb at mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
index b53fc85..b64a781 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_cmd.c
@@ -473,10 +473,13 @@ int mlx5_encap_alloc(struct mlx5_core_dev *dev,
 	int err;
 	u32 *in;
 
-	if (size > MLX5_CAP_ESW(dev, max_encap_header_size))
+	if (size > max_encap_size) {
+		mlx5_core_warn(dev, "encap size %zd too big, max supported is %d\n",
+			       size, max_encap_size);
 		return -EINVAL;
+	}
 
-	in = kzalloc(MLX5_ST_SZ_BYTES(alloc_encap_header_in) + max_encap_size,
+	in = kzalloc(MLX5_ST_SZ_BYTES(alloc_encap_header_in) + size,
 		     GFP_KERNEL);
 	if (!in)
 		return -ENOMEM;
-- 
2.5.0