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-rw-r--r--drivers/base/devres.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 2360adb7a58..8731979d668 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -144,6 +144,48 @@ EXPORT_SYMBOL_GPL(devres_alloc);
#endif
/**
+ * devres_for_each_res - Resource iterator
+ * @dev: Device to iterate resource from
+ * @release: Look for resources associated with this release function
+ * @match: Match function (optional)
+ * @match_data: Data for the match function
+ * @fn: Function to be called for each matched resource.
+ * @data: Data for @fn, the 3rd parameter of @fn
+ *
+ * Call @fn for each devres of @dev which is associated with @release
+ * and for which @match returns 1.
+ *
+ * RETURNS:
+ * void
+ */
+void devres_for_each_res(struct device *dev, dr_release_t release,
+ dr_match_t match, void *match_data,
+ void (*fn)(struct device *, void *, void *),
+ void *data)
+{
+ struct devres_node *node;
+ struct devres_node *tmp;
+ unsigned long flags;
+
+ if (!fn)
+ return;
+
+ spin_lock_irqsave(&dev->devres_lock, flags);
+ list_for_each_entry_safe_reverse(node, tmp,
+ &dev->devres_head, entry) {
+ struct devres *dr = container_of(node, struct devres, node);
+
+ if (node->release != release)
+ continue;
+ if (match && !match(dev, dr->data, match_data))
+ continue;
+ fn(dev, dr->data, data);
+ }
+ spin_unlock_irqrestore(&dev->devres_lock, flags);
+}
+EXPORT_SYMBOL_GPL(devres_for_each_res);
+
+/**
* devres_free - Free device resource data
* @res: Pointer to devres data to free
*