From cbcd075ba578be1932d03eedb9b4656f86a27308 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@canonical.com>
Date: Sat, 4 Aug 2012 12:01:26 +0800
Subject: [PATCH] --- yaml --- r: 324375 b: refs/heads/master c:
 bddb1b9078505bb0e430c87c5015c0963f7a594f h: refs/heads/master i:   324373:
 03c2dc0ec31661e03ea619d736ed2afae13e6965   324371:
 b1fb9fbc26e040218947c1ff0918e83eeab015b2   324367:
 ad30f796befacca603659e9f4fe3256893e8641a v: v3

---
 [refs]                       |  2 +-
 trunk/drivers/base/devres.c  | 42 ++++++++++++++++++++++++++++++++++++
 trunk/include/linux/device.h |  4 ++++
 3 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 4a4284e86b59..6276473204dd 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f531f05ae9437df5ba1ebd90017e4dd5526048e9
+refs/heads/master: bddb1b9078505bb0e430c87c5015c0963f7a594f
diff --git a/trunk/drivers/base/devres.c b/trunk/drivers/base/devres.c
index 2360adb7a58f..8731979d668a 100644
--- a/trunk/drivers/base/devres.c
+++ b/trunk/drivers/base/devres.c
@@ -143,6 +143,48 @@ void * devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
 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
diff --git a/trunk/include/linux/device.h b/trunk/include/linux/device.h
index 52a5f15a2223..ecd900663726 100644
--- a/trunk/include/linux/device.h
+++ b/trunk/include/linux/device.h
@@ -536,6 +536,10 @@ extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
 #else
 extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
 #endif
+extern 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);
 extern void devres_free(void *res);
 extern void devres_add(struct device *dev, void *res);
 extern void *devres_find(struct device *dev, dr_release_t release,