[PATCH] devres: release resources on device_del()

[Tejun Heo <htejun@gmail.com>]

Some platform devices are driven without driver attached, so managed
resources can be acquired without driver attached.  Make sure such
resources are released by calling devres_release_all() in
device_del().

Signed-off-by: Tejun Heo <htejun@gmail.com>
---
This one fixes oops on pata_platform and pata_legacy unload.  libata
being the only user of devres at the moment.  I think this can go
through libata-dev#upstream.

 drivers/base/core.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index cf2a398..89ebe36 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -787,6 +787,13 @@ void device_del(struct device * dev)
 	device_remove_attrs(dev);
 	bus_remove_device(dev);
 
+	/*
+	 * Some platform devices are driven without driver attached
+	 * and managed resources may have been acquired.  Make sure
+	 * all resources are released.
+	 */
+	devres_release_all(dev);
+
 	/* Notify the platform of the removal, in case they
 	 * need to do anything...
 	 */
-- 
1.5.0.1