[PATCH] net/mlx5: unique names for per device caches

[Matt Fleming <matt@readmodwrite.com>]

From: Sebastian Ott <sebott@redhat.com>

[ Upstream commit 25872a079bbbe952eb660249cc9f40fa75623e68 ]

Add the device name to the per device kmem_cache names to
ensure their uniqueness. This fixes warnings like this:
"kmem_cache of name 'mlx5_fs_fgs' already exists".

Fixes: 4c39529663b9 ("slab: Warn on duplicate cache names when DEBUG_VM=y")
Signed-off-by: Sebastian Ott <sebott@redhat.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241023134146.28448-1-sebott@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Matt Fleming <mfleming@cloudflare.com>
---

This backport only needs applying to 6.12.y.

I also added a Fixes tag that was missing from the upstream commit

 drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 6e4f8aaf8d2f..2eabfcc247c6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -3698,6 +3698,7 @@ void mlx5_fs_core_free(struct mlx5_core_dev *dev)
 int mlx5_fs_core_alloc(struct mlx5_core_dev *dev)
 {
 	struct mlx5_flow_steering *steering;
+	char name[80];
 	int err = 0;
 
 	err = mlx5_init_fc_stats(dev);
@@ -3722,10 +3723,12 @@ int mlx5_fs_core_alloc(struct mlx5_core_dev *dev)
 	else
 		steering->mode = MLX5_FLOW_STEERING_MODE_DMFS;
 
-	steering->fgs_cache = kmem_cache_create("mlx5_fs_fgs",
+	snprintf(name, sizeof(name), "%s-mlx5_fs_fgs", dev_name(dev->device));
+	steering->fgs_cache = kmem_cache_create(name,
 						sizeof(struct mlx5_flow_group), 0,
 						0, NULL);
-	steering->ftes_cache = kmem_cache_create("mlx5_fs_ftes", sizeof(struct fs_fte), 0,
+	snprintf(name, sizeof(name), "%s-mlx5_fs_ftes", dev_name(dev->device));
+	steering->ftes_cache = kmem_cache_create(name, sizeof(struct fs_fte), 0,
 						 0, NULL);
 	if (!steering->ftes_cache || !steering->fgs_cache) {
 		err = -ENOMEM;
-- 
2.34.1