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net/mlx5: devcom only supports 2 ports

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[ Upstream commit 8a6e75e5f5 ]

Devcom API is intended to be used between 2 devices only add this
implied assumption into the code and check when it's no true.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Stable-dep-of: 691c041bf2 ("net/mlx5e: Fix deadlock in tc route query code")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mark Bloch 2022-02-27 12:23:34 +00:00 committed by Greg Kroah-Hartman
parent 79ea1a12fb
commit 1c4e3cf894
2 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
View File

@ -14,7 +14,7 @@ static LIST_HEAD(devcom_list);
struct mlx5_devcom_component {
struct {
void *data;
} device[MLX5_MAX_PORTS];
} device[MLX5_DEVCOM_PORTS_SUPPORTED];
mlx5_devcom_event_handler_t handler;
struct rw_semaphore sem;
@ -25,7 +25,7 @@ struct mlx5_devcom_list {
struct list_head list;
struct mlx5_devcom_component components[MLX5_DEVCOM_NUM_COMPONENTS];
struct mlx5_core_dev *devs[MLX5_MAX_PORTS];
struct mlx5_core_dev *devs[MLX5_DEVCOM_PORTS_SUPPORTED];
};
struct mlx5_devcom {
@ -74,13 +74,15 @@ struct mlx5_devcom *mlx5_devcom_register_device(struct mlx5_core_dev *dev)
if (!mlx5_core_is_pf(dev))
return NULL;
if (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_DEVCOM_PORTS_SUPPORTED)
return NULL;
sguid0 = mlx5_query_nic_system_image_guid(dev);
list_for_each_entry(iter, &devcom_list, list) {
struct mlx5_core_dev *tmp_dev = NULL;
idx = -1;
for (i = 0; i < MLX5_MAX_PORTS; i++) {
for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++) {
if (iter->devs[i])
tmp_dev = iter->devs[i];
else
@ -135,11 +137,11 @@ void mlx5_devcom_unregister_device(struct mlx5_devcom *devcom)
kfree(devcom);
for (i = 0; i < MLX5_MAX_PORTS; i++)
for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++)
if (priv->devs[i])
break;
if (i != MLX5_MAX_PORTS)
if (i != MLX5_DEVCOM_PORTS_SUPPORTED)
return;
list_del(&priv->list);
@ -192,7 +194,7 @@ int mlx5_devcom_send_event(struct mlx5_devcom *devcom,
comp = &devcom->priv->components[id];
down_write(&comp->sem);
for (i = 0; i < MLX5_MAX_PORTS; i++)
for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++)
if (i != devcom->idx && comp->device[i].data) {
err = comp->handler(event, comp->device[i].data,
event_data);
@ -240,7 +242,7 @@ void *mlx5_devcom_get_peer_data(struct mlx5_devcom *devcom,
return NULL;
}
for (i = 0; i < MLX5_MAX_PORTS; i++)
for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++)
if (i != devcom->idx)
break;

2
drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.h
View File

@ -6,6 +6,8 @@
#include <linux/mlx5/driver.h>
#define MLX5_DEVCOM_PORTS_SUPPORTED 2
enum mlx5_devcom_components {
MLX5_DEVCOM_ESW_OFFLOADS,