Signed-off-by: Jeff Garzik <jeff@xxxxxxxxxx>
---
drivers/scsi/raid_class.c | 20 ++++++++++++++++----
include/linux/raid_class.h | 5 +++--
2 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/scsi/raid_class.c b/drivers/scsi/raid_class.c
index 327b33a..e79f3d9 100644
--- a/drivers/scsi/raid_class.c
+++ b/drivers/scsi/raid_class.c
@@ -215,18 +215,19 @@ static void raid_component_release(struc
kfree(rc);
}
-void raid_component_add(struct raid_template *r,struct device *raid_dev,
- struct device *component_dev)
+int raid_component_add(struct raid_template *r,struct device *raid_dev,
+ struct device *component_dev)
{
struct class_device *cdev =
attribute_container_find_class_device(&r->raid_attrs.ac,
raid_dev);
struct raid_component *rc;
struct raid_data *rd = class_get_devdata(cdev);
+ int err;
rc = kzalloc(sizeof(*rc), GFP_KERNEL);
if (!rc)
- return;
+ return -ENOMEM;
INIT_LIST_HEAD(&rc->node);
class_device_initialize(&rc->cdev);
@@ -239,7 +240,18 @@ void raid_component_add(struct raid_temp
list_add_tail(&rc->node, &rd->component_list);
rc->cdev.parent = cdev;
rc->cdev.class = &raid_class.class;
- class_device_add(&rc->cdev);
+ err = class_device_add(&rc->cdev);
+ if (err)
+ goto err_out;
+
+ return 0;
+
+err_out:
+ list_del(&rc->node);
+ rd->component_count--;
+ put_device(component_dev);
+ kfree(rc);
+ return err;
}
EXPORT_SYMBOL(raid_component_add);
diff --git a/include/linux/raid_class.h b/include/linux/raid_class.h
index d0dd38b..d22ad39 100644
--- a/include/linux/raid_class.h
+++ b/include/linux/raid_class.h
@@ -77,5 +77,6 @@ DEFINE_RAID_ATTRIBUTE(enum raid_state, s
struct raid_template *raid_class_attach(struct raid_function_template *);
void raid_class_release(struct raid_template *);
-void raid_component_add(struct raid_template *, struct device *,
- struct device *);
+int __must_check raid_component_add(struct raid_template *, struct device *,
+ struct device *);
+
-
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