[PATCH] EDAC: kobject_init/kobject_put fixes

- Remove calls to kobject_init().  These are unnecessary because
  kobject_register() calls kobject_init().

- Remove extra calls to kobject_put().  When we call
  kobject_unregister(), this releases our reference to the kobject.
  The extra calls to kobject_put() may cause the reference count to
  drop to 0 while a kobject is still in use.

Signed-off-by: David S. Peterson <dsp@llnl.gov>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index d37a4c4..e6ecc7d 100644 (file)
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -278,8 +278,6 @@ static int edac_sysfs_memctrl_setup(void)
        if (!err) {
                /* Init the MC's kobject */
                memset(&edac_memctrl_kobj, 0, sizeof (edac_memctrl_kobj));
-               kobject_init(&edac_memctrl_kobj);
-
                edac_memctrl_kobj.parent = &edac_class.kset.kobj;
                edac_memctrl_kobj.ktype = &ktype_memctrl;
 
@@ -314,9 +312,6 @@ static void edac_sysfs_memctrl_teardown(void)
        /* Unregister the MC's kobject */
        kobject_unregister(&edac_memctrl_kobj);
 
-       /* release the master edac mc kobject */
-       kobject_put(&edac_memctrl_kobj);
-
        /* Unregister the 'edac' object */
        sysdev_class_unregister(&edac_class);
 #endif  /* DISABLE_EDAC_SYSFS */
@@ -594,8 +589,6 @@ static int edac_sysfs_pci_setup(void)
        debugf1("%s()\n", __func__);
 
        memset(&edac_pci_kobj, 0, sizeof(edac_pci_kobj));
-
-       kobject_init(&edac_pci_kobj);
        edac_pci_kobj.parent = &edac_class.kset.kobj;
        edac_pci_kobj.ktype = &ktype_edac_pci;
 
@@ -619,7 +612,6 @@ static void edac_sysfs_pci_teardown(void)
        debugf0("%s()\n", __func__);
 
        kobject_unregister(&edac_pci_kobj);
-       kobject_put(&edac_pci_kobj);
 #endif
 }
 
@@ -829,7 +821,6 @@ static int edac_create_csrow_object(struct kobject *edac_mci_kobj,
 
        /* generate ..../edac/mc/mc<id>/csrow<index>   */
 
-       kobject_init(&csrow->kobj);
        csrow->kobj.parent = edac_mci_kobj;
        csrow->kobj.ktype = &ktype_csrow;
 
@@ -1104,7 +1095,6 @@ static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
        debugf0("%s() idx=%d\n", __func__, mci->mc_idx);
 
        memset(edac_mci_kobj, 0, sizeof(*edac_mci_kobj));
-       kobject_init(edac_mci_kobj);
 
        /* set the name of the mc<id> object */
        err = kobject_set_name(edac_mci_kobj,"mc%d",mci->mc_idx);
@@ -1123,10 +1113,8 @@ static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
        /* create a symlink for the device */
        err = sysfs_create_link(edac_mci_kobj, &mci->pdev->dev.kobj,
                                EDAC_DEVICE_SYMLINK);
-       if (err) {
-               kobject_unregister(edac_mci_kobj);
-               return err;
-       }
+       if (err)
+               goto fail0;
 
        /* Make directories for each CSROW object
         * under the mc<id> kobject
@@ -1139,7 +1127,7 @@ static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
                if (csrow->nr_pages > 0) {
                        err = edac_create_csrow_object(edac_mci_kobj,csrow,i);
                        if (err)
-                               goto fail;
+                               goto fail1;
                }
        }
 
@@ -1150,16 +1138,14 @@ static int edac_create_sysfs_mci_device(struct mem_ctl_info *mci)
 
 
        /* CSROW error: backout what has already been registered,  */
-fail:
+fail1:
        for ( i--; i >= 0; i--) {
-               if (csrow->nr_pages > 0) {
+               if (csrow->nr_pages > 0)
                        kobject_unregister(&mci->csrows[i].kobj);
-                       kobject_put(&mci->csrows[i].kobj);
-               }
        }
 
+fail0:
        kobject_unregister(edac_mci_kobj);
-       kobject_put(edac_mci_kobj);
 
        return err;
 }
@@ -1177,16 +1163,13 @@ static void edac_remove_sysfs_mci_device(struct mem_ctl_info *mci)
 
        /* remove all csrow kobjects */
        for (i = 0; i < mci->nr_csrows; i++) {
-               if (mci->csrows[i].nr_pages > 0)  {
+               if (mci->csrows[i].nr_pages > 0)
                        kobject_unregister(&mci->csrows[i].kobj);
-                       kobject_put(&mci->csrows[i].kobj);
-               }
        }
 
        sysfs_remove_link(&mci->edac_mci_kobj, EDAC_DEVICE_SYMLINK);
 
        kobject_unregister(&mci->edac_mci_kobj);
-       kobject_put(&mci->edac_mci_kobj);
 #endif  /* DISABLE_EDAC_SYSFS */
 }