drivers/edac: add device sysfs attributes

Added new controls for the edac_device and edac_mc sysfs folder.
These can be initialized by the low level driver to provide misc
controls into the low level driver for its use

Signed-off-by: Douglas Thompson <dougthompson@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 46 insertions, 5 deletions

diff --git a/drivers/edac/edac_device_sysfs.c b/drivers/edac/edac_device_sysfs.c
index 849d569dd2ce..32b2a8e53dc7 100644
--- a/drivers/edac/edac_device_sysfs.c
+++ b/drivers/edac/edac_device_sysfs.c
@@ -9,8 +9,6 @@
  *
  */
 
-#include <linux/module.h>
-#include <linux/sysdev.h>
 #include <linux/ctype.h>
 
 #include "edac_core.h"
@@ -622,6 +620,34 @@ static void edac_device_delete_instances(struct edac_device_ctl_info *edac_dev)
 /******************* edac_dev sysfs ctor/dtor  code *************/
 
 /*
+ * edac_device_add_sysfs_attributes
+ *      add some attributes to this instance's main kobject
+ */
+static int edac_device_add_sysfs_attributes(
+                        struct edac_device_ctl_info *edac_dev)
+{
+        int err;
+        struct edac_dev_sysfs_attribute *sysfs_attrib;
+
+        /* point to the start of the array and iterate over it
+         * adding each attribute listed to this mci instance's kobject
+         */
+        sysfs_attrib = edac_dev->sysfs_attributes;
+
+        while (sysfs_attrib->attr.name != NULL) {
+                err = sysfs_create_file(&edac_dev->kobj,
+                                        (struct attribute*) sysfs_attrib);
+                if (err) {
+                        return err;
+                }
+
+                sysfs_attrib++;
+        }
+
+        return 0;
+}
+
+/*
  * edac_device_create_sysfs() Constructor
  *
  * Create a new edac_device kobject instance,
@@ -642,6 +668,18 @@ int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
 
         debugf0("%s() idx=%d\n", __func__, edac_dev->dev_idx);
 
+        /* If the low level driver requests some sysfs entries
+         * then go create them here
+         */
+        if (edac_dev->sysfs_attributes != NULL) {
+                err = edac_device_add_sysfs_attributes(edac_dev);
+                if (err) {
+                        debugf0("%s() failed to add sysfs attribs\n",
+                                __func__);
+                        goto err_unreg_object;
+                }
+        }
+
         /* create a symlink from the edac device
          * to the platform 'device' being used for this
          */
@@ -650,7 +688,7 @@ int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
         if (err) {
                 debugf0("%s() sysfs_create_link() returned err= %d\n",
                         __func__, err);
-                return err;
+                goto err_unreg_object;
         }
 
         debugf0("%s() calling create-instances, idx=%d\n",
@@ -659,14 +697,17 @@ int edac_device_create_sysfs(struct edac_device_ctl_info *edac_dev)
         /* Create the first level instance directories */
         err = edac_device_create_instances(edac_dev);
         if (err) {
-                goto error0;
+                goto err_remove_link;
         }
 
         return 0;
 
         /* Error unwind stack */
+err_remove_link:
+        /* remove the sym link */
+        sysfs_remove_link(&edac_dev->kobj, EDAC_DEVICE_SYMLINK);
 
-      error0:
+err_unreg_object:
         edac_device_unregister_main_kobj(edac_dev);
 
         return err;