rtl8211F_led_control

hc

2024-05-11 297b60346df8beafee954a0fd7c2d64f33f3b9bc

 kernel/drivers/net/ethernet/mellanox/mlxsw/spectrum_kvdl.c
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@@ -2,13 +2,15 @@
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 /* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
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 #include <linux/kernel.h>
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+#include <linux/mutex.h>
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 #include <linux/slab.h>
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 #include "spectrum.h"
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 struct mlxsw_sp_kvdl {
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 	const struct mlxsw_sp_kvdl_ops *kvdl_ops;
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-	unsigned long priv[0];
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+	struct mutex kvdl_lock; /* Protects kvdl allocations */
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+	unsigned long priv[];
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 	/* priv has to be always the last item */
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 };
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@@ -22,6 +24,7 @@
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 		       GFP_KERNEL);
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 	if (!kvdl)
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 		return -ENOMEM;
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+	mutex_init(&kvdl->kvdl_lock);
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 	kvdl->kvdl_ops = kvdl_ops;
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 	mlxsw_sp->kvdl = kvdl;
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@@ -31,6 +34,7 @@
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 	return 0;
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 err_init:
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+	mutex_destroy(&kvdl->kvdl_lock);
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 	kfree(kvdl);
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 	return err;
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 }
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@@ -40,6 +44,7 @@
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 	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
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 	kvdl->kvdl_ops->fini(mlxsw_sp, kvdl->priv);
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+	mutex_destroy(&kvdl->kvdl_lock);
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 	kfree(kvdl);
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 }
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@@ -48,9 +53,14 @@
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 			unsigned int entry_count, u32 *p_entry_index)
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 {
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 	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
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+	int err;
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-	return kvdl->kvdl_ops->alloc(mlxsw_sp, kvdl->priv, type,
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-				     entry_count, p_entry_index);
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+	mutex_lock(&kvdl->kvdl_lock);
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+	err = kvdl->kvdl_ops->alloc(mlxsw_sp, kvdl->priv, type,
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+				    entry_count, p_entry_index);
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+	mutex_unlock(&kvdl->kvdl_lock);
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+
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+	return err;
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 }
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 void mlxsw_sp_kvdl_free(struct mlxsw_sp *mlxsw_sp,
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@@ -59,8 +69,10 @@
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 {
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 	struct mlxsw_sp_kvdl *kvdl = mlxsw_sp->kvdl;
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+	mutex_lock(&kvdl->kvdl_lock);
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 	kvdl->kvdl_ops->free(mlxsw_sp, kvdl->priv, type,
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 			     entry_count, entry_index);
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+	mutex_unlock(&kvdl->kvdl_lock);
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 }
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 int mlxsw_sp_kvdl_alloc_count_query(struct mlxsw_sp *mlxsw_sp,