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-rw-r--r--lib/genalloc.c49
1 files changed, 28 insertions, 21 deletions
diff --git a/lib/genalloc.c b/lib/genalloc.c
index daf0afb6d979..b13cfd1a366e 100644
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -571,23 +571,46 @@ static void devm_gen_pool_release(struct device *dev, void *res)
}
/**
+ * gen_pool_get - Obtain the gen_pool (if any) for a device
+ * @dev: device to retrieve the gen_pool from
+ * @name: name of a gen_pool or NULL, identifies a particular gen_pool on device
+ *
+ * Returns the gen_pool for the device if one is present, or NULL.
+ */
+struct gen_pool *gen_pool_get(struct device *dev, const char *name)
+{
+ struct gen_pool **p;
+
+ p = devres_find(dev, devm_gen_pool_release, NULL, NULL);
+ if (!p)
+ return NULL;
+ return *p;
+}
+EXPORT_SYMBOL_GPL(gen_pool_get);
+
+/**
* devm_gen_pool_create - managed gen_pool_create
* @dev: device that provides the gen_pool
* @min_alloc_order: log base 2 of number of bytes each bitmap bit represents
- * @nid: node id of the node the pool structure should be allocated on, or -1
+ * @nid: node selector for allocated gen_pool, %NUMA_NO_NODE for all nodes
+ * @name: name of a gen_pool or NULL, identifies a particular gen_pool on device
*
* Create a new special memory pool that can be used to manage special purpose
* memory not managed by the regular kmalloc/kfree interface. The pool will be
* automatically destroyed by the device management code.
*/
struct gen_pool *devm_gen_pool_create(struct device *dev, int min_alloc_order,
- int nid)
+ int nid, const char *name)
{
struct gen_pool **ptr, *pool;
+ /* Check that genpool to be created is uniquely addressed on device */
+ if (gen_pool_get(dev, name))
+ return ERR_PTR(-EINVAL);
+
ptr = devres_alloc(devm_gen_pool_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
- return NULL;
+ return ERR_PTR(-ENOMEM);
pool = gen_pool_create(min_alloc_order, nid);
if (pool) {
@@ -595,29 +618,13 @@ struct gen_pool *devm_gen_pool_create(struct device *dev, int min_alloc_order,
devres_add(dev, ptr);
} else {
devres_free(ptr);
+ return ERR_PTR(-ENOMEM);
}
return pool;
}
EXPORT_SYMBOL(devm_gen_pool_create);
-/**
- * gen_pool_get - Obtain the gen_pool (if any) for a device
- * @dev: device to retrieve the gen_pool from
- *
- * Returns the gen_pool for the device if one is present, or NULL.
- */
-struct gen_pool *gen_pool_get(struct device *dev)
-{
- struct gen_pool **p = devres_find(dev, devm_gen_pool_release, NULL,
- NULL);
-
- if (!p)
- return NULL;
- return *p;
-}
-EXPORT_SYMBOL_GPL(gen_pool_get);
-
#ifdef CONFIG_OF
/**
* of_gen_pool_get - find a pool by phandle property
@@ -642,7 +649,7 @@ struct gen_pool *of_gen_pool_get(struct device_node *np,
of_node_put(np_pool);
if (!pdev)
return NULL;
- return gen_pool_get(&pdev->dev);
+ return gen_pool_get(&pdev->dev, NULL);
}
EXPORT_SYMBOL_GPL(of_gen_pool_get);
#endif /* CONFIG_OF */