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-rw-r--r--kernel/resource.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index b3a3a1fc499e..17bcb189d530 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -318,14 +318,14 @@ int release_resource(struct resource *old)
EXPORT_SYMBOL(release_resource);
-/**
+/*
* Finds the lowest iomem resource that covers part of [start..end]. The
* caller must specify start, end, flags, and desc (which may be
* IORES_DESC_NONE).
*
* If a resource is found, returns 0 and *res is overwritten with the part
* of the resource that's within [start..end]; if none is found, returns
- * -1.
+ * -1. Returns -EINVAL for other invalid parameters.
*
* This function walks the whole tree and not just first level children
* unless @first_lvl is true.
@@ -390,7 +390,9 @@ static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
}
/**
- * Walks through iomem resources and calls func() with matching resource
+ * walk_iomem_res_desc - walk through iomem resources
+ *
+ * Walks through iomem resources and calls @func() with matching resource
* ranges. This walks through whole tree and not just first level children.
* All the memory ranges which overlap start,end and also match flags and
* desc are valid candidates.
@@ -399,6 +401,8 @@ static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
* @flags: I/O resource flags
* @start: start addr
* @end: end addr
+ * @arg: function argument for the callback @func
+ * @func: callback function that is called for each qualifying resource area
*
* NOTE: For a new descriptor search, define a new IORES_DESC in
* <linux/ioport.h> and set it in 'desc' of a target resource entry.