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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
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@@ -3,6 +3,7 @@
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3
 
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 #include <linux/mlx5/vport.h>
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 #include "lib/devcom.h"
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+#include "mlx5_core.h"
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7
 
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 static LIST_HEAD(devcom_list);
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9
 
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@@ -14,7 +15,7 @@
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 struct mlx5_devcom_component {
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 	struct {
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 		void *data;
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-	} device[MLX5_MAX_PORTS];
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+	} device[MLX5_DEVCOM_PORTS_SUPPORTED];
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 	mlx5_devcom_event_handler_t handler;
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 	struct rw_semaphore sem;
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@@ -25,7 +26,7 @@
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 	struct list_head list;
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 	struct mlx5_devcom_component components[MLX5_DEVCOM_NUM_COMPONENTS];
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-	struct mlx5_core_dev *devs[MLX5_MAX_PORTS];
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+	struct mlx5_core_dev *devs[MLX5_DEVCOM_PORTS_SUPPORTED];
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 };
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 struct mlx5_devcom {
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@@ -74,13 +75,16 @@
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 	if (!mlx5_core_is_pf(dev))
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 		return NULL;
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+	if (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_DEVCOM_PORTS_SUPPORTED)
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+		return NULL;
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+	mlx5_dev_list_lock();
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 	sguid0 = mlx5_query_nic_system_image_guid(dev);
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 	list_for_each_entry(iter, &devcom_list, list) {
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 		struct mlx5_core_dev *tmp_dev = NULL;
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 		idx = -1;
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-		for (i = 0; i < MLX5_MAX_PORTS; i++) {
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+		for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++) {
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 			if (iter->devs[i])
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 				tmp_dev = iter->devs[i];
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 			else
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@@ -100,8 +104,10 @@
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 	if (!priv) {
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 		priv = mlx5_devcom_list_alloc();
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-		if (!priv)
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-			return ERR_PTR(-ENOMEM);
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+		if (!priv) {
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+			devcom = ERR_PTR(-ENOMEM);
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+			goto out;
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+		}
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 		idx = 0;
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 		new_priv = true;
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@@ -110,13 +116,16 @@
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 	priv->devs[idx] = dev;
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 	devcom = mlx5_devcom_alloc(priv, idx);
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 	if (!devcom) {
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-		kfree(priv);
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-		return ERR_PTR(-ENOMEM);
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+		if (new_priv)
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+			kfree(priv);
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+		devcom = ERR_PTR(-ENOMEM);
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+		goto out;
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 	}
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 	if (new_priv)
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 		list_add(&priv->list, &devcom_list);
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-
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+out:
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+	mlx5_dev_list_unlock();
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 	return devcom;
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 }
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@@ -129,20 +138,23 @@
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 	if (IS_ERR_OR_NULL(devcom))
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 		return;
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+	mlx5_dev_list_lock();
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 	priv = devcom->priv;
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 	priv->devs[devcom->idx] = NULL;
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144
 
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 	kfree(devcom);
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-	for (i = 0; i < MLX5_MAX_PORTS; i++)
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+	for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++)
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 		if (priv->devs[i])
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 			break;
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-	if (i != MLX5_MAX_PORTS)
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-		return;
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+	if (i != MLX5_DEVCOM_PORTS_SUPPORTED)
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+		goto out;
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 	list_del(&priv->list);
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 	kfree(priv);
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+out:
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+	mlx5_dev_list_unlock();
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 }
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 void mlx5_devcom_register_component(struct mlx5_devcom *devcom,
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@@ -191,7 +203,7 @@
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 	comp = &devcom->priv->components[id];
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 	down_write(&comp->sem);
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-	for (i = 0; i < MLX5_MAX_PORTS; i++)
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+	for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++)
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 		if (i != devcom->idx && comp->device[i].data) {
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 			err = comp->handler(event, comp->device[i].data,
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 					    event_data);
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@@ -239,7 +251,7 @@
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 		return NULL;
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 	}
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-	for (i = 0; i < MLX5_MAX_PORTS; i++)
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+	for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++)
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 		if (i != devcom->idx)
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 			break;
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