[v3,01/25] resource: Add a resource_list_first_type helper

Commit Message

Rob Herring (Arm) Oct. 28, 2019, 4:32 p.m. UTC

A common pattern is looping over a resource_list just to get a matching
entry with a specific type. Add resource_list_first_type() helper which
implements this.

Signed-off-by: Rob Herring <[e-mail]>
---
v3:
- Rename resource_list_get_entry_of_type to resource_list_first_type

 include/linux/resource_ext.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

--
2.20.1

Patch

diff --git a/include/linux/resource_ext.h b/include/linux/resource_ext.h
index 06da59b23b79..ff0339df56af 100644
--- a/include/linux/resource_ext.h
+++ b/include/linux/resource_ext.h
@@ -66,4 +66,16 @@  resource_list_destroy_entry(struct resource_entry *entry)
 #define resource_list_for_each_entry_safe(entry, tmp, list)	\
 	list_for_each_entry_safe((entry), (tmp), (list), node)

+static inline struct resource_entry *
+resource_list_first_type(struct list_head *list, unsigned long type)
+{
+	struct resource_entry *entry;
+
+	resource_list_for_each_entry(entry, list) {
+		if (resource_type(entry->res) == type)
+			return entry;
+	}
+	return NULL;
+}
+
 #endif /* _LINUX_RESOURCE_EXT_H */