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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-05-03 21:15:13 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-05 03:33:16 +0400
commitd926d0e4c74cfcb42a05e91d1cdf698b41e1e118 (patch)
tree9d7cdc794f6c56ef728c751759d8ef639ee6f38f /drivers/base/devres.c
parent698cd2ddd851b34e7200b4f846ae68306e11bae4 (diff)
downloadlinux-d926d0e4c74cfcb42a05e91d1cdf698b41e1e118.tar.xz
devres: Add devres_release()
APIs using devres frequently want to implement a "remove and free the resource" operation so it seems sensible that they should be able to just have devres do the freeing for them since that's a big part of what devres is all about. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/devres.c')
-rw-r--r--drivers/base/devres.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 1741a60de117..2360adb7a58f 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -330,6 +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)