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-rw-r--r--drivers/base/devres.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 524bf96c289f..2360adb7a58f 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -309,6 +309,10 @@ EXPORT_SYMBOL_GPL(devres_remove);
* which @match returns 1. If @match is NULL, it's considered to
* match all. If found, the resource is removed atomically and freed.
*
+ * Note that the release function for the resource will not be called,
+ * only the devres-allocated data will be freed. The caller becomes
+ * responsible for freeing any other data.
+ *
* RETURNS:
* 0 if devres is found and freed, -ENOENT if not found.
*/
@@ -326,6 +330,37 @@ int devres_destroy(struct device *dev, dr_release_t release,
}
EXPORT_SYMBOL_GPL(devres_destroy);
+
+/**
+ * devres_release - Find a device resource and destroy it, calling release
+ * @dev: Device to find resource from
+ * @release: Look for resources associated with this release function
+ * @match: Match function (optional)
+ * @match_data: Data for the match function
+ *
+ * Find the latest devres of @dev associated with @release and for
+ * which @match returns 1. If @match is NULL, it's considered to
+ * match all. If found, the resource is removed atomically, the
+ * release function called and the resource freed.
+ *
+ * RETURNS:
+ * 0 if devres is found and freed, -ENOENT if not found.
+ */
+int devres_release(struct device *dev, dr_release_t release,
+ dr_match_t match, void *match_data)
+{
+ void *res;
+
+ res = devres_remove(dev, release, match, match_data);
+ if (unlikely(!res))
+ return -ENOENT;
+
+ (*release)(dev, res);
+ devres_free(res);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devres_release);
+
static int remove_nodes(struct device *dev,
struct list_head *first, struct list_head *end,
struct list_head *todo)