drivers/edac: fix edac_device sysfs completion code
With feedback, this patch corrects operation of the kobject release operation
on kobjects, attributes and controls for the edac_device.
Cc: Alan Cox alan@lxorguk.ukuu.org.uk
Signed-off-by: Doug Thompson <dougthompson@xmission.com>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c
index 6020da6..173f4ba0 100644
--- a/drivers/edac/edac_device.c
+++ b/drivers/edac/edac_device.c
@@ -48,6 +48,7 @@
}
#endif /* CONFIG_EDAC_DEBUG */
+
/*
* edac_device_alloc_ctl_info()
* Allocate a new edac device control info structure
@@ -78,6 +79,7 @@
unsigned count;
unsigned instance, block, attr;
void *pvt;
+ int err;
debugf1("%s() instances=%d blocks=%d\n",
__func__, nr_instances, nr_blocks);
@@ -208,6 +210,22 @@
/* Mark this instance as merely ALLOCATED */
dev_ctl->op_state = OP_ALLOC;
+ /*
+ * Initialize the 'root' kobj for the edac_device controller
+ */
+ err = edac_device_register_sysfs_main_kobj(dev_ctl);
+ if (err) {
+ kfree(dev_ctl);
+ return NULL;
+ }
+
+ /* at this point, the root kobj is valid, and in order to
+ * 'free' the object, then the function:
+ * edac_device_unregister_sysfs_main_kobj() must be called
+ * which will perform kobj unregistration and the actual free
+ * will occur during the kobject callback operation
+ */
+
return dev_ctl;
}
EXPORT_SYMBOL_GPL(edac_device_alloc_ctl_info);
@@ -219,7 +237,7 @@
*/
void edac_device_free_ctl_info(struct edac_device_ctl_info *ctl_info)
{
- kfree(ctl_info);
+ edac_device_unregister_sysfs_main_kobj(ctl_info);
}
EXPORT_SYMBOL_GPL(edac_device_free_ctl_info);
@@ -315,22 +333,23 @@
edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
INIT_LIST_HEAD(&edac_dev->link);
- complete(&edac_dev->complete);
+ complete(&edac_dev->removal_complete);
}
/*
* del_edac_device_from_global_list
*
- * remove the RCU, setup for a callback call, then wait for the
- * callback to occur
+ * remove the RCU, setup for a callback call,
+ * then wait for the callback to occur
*/
static void del_edac_device_from_global_list(struct edac_device_ctl_info
*edac_device)
{
list_del_rcu(&edac_device->link);
- init_completion(&edac_device->complete);
+
+ init_completion(&edac_device->removal_complete);
call_rcu(&edac_device->rcu, complete_edac_device_list_del);
- wait_for_completion(&edac_device->complete);
+ wait_for_completion(&edac_device->removal_complete);
}
/**
@@ -542,14 +561,14 @@
/* clear workq processing on this instance */
edac_device_workq_teardown(edac_dev);
- /* Tear down the sysfs entries for this instance */
- edac_device_remove_sysfs(edac_dev);
-
/* deregister from global list */
del_edac_device_from_global_list(edac_dev);
mutex_unlock(&device_ctls_mutex);
+ /* Tear down the sysfs entries for this instance */
+ edac_device_remove_sysfs(edac_dev);
+
edac_printk(KERN_INFO, EDAC_MC,
"Removed device %d for %s %s: DEV %s\n",
edac_dev->dev_idx,