i2c: i801: Add support for Intel DNV

[pandora-kernel.git] / drivers / edac / edac_mc.c

diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 1d80560..7db101b 100644 (file)
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -323,7 +323,8 @@ static void edac_mc_workq_function(struct work_struct *work_req)
  *
  *             called with the mem_ctls_mutex held
  */
-static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec)
+static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec,
+                               bool init)
 {
        debugf0("%s()\n", __func__);
 
@@ -331,7 +332,9 @@ static void edac_mc_workq_setup(struct mem_ctl_info *mci, unsigned msec)
        if (mci->op_state != OP_RUNNING_POLL)
                return;
 
-       INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
+       if (init)
+               INIT_DELAYED_WORK(&mci->work, edac_mc_workq_function);
+
        queue_delayed_work(edac_workqueue, &mci->work, msecs_to_jiffies(msec));
 }
 
@@ -391,7 +394,7 @@ void edac_mc_reset_delay_period(int value)
        list_for_each(item, &mc_devices) {
                mci = list_entry(item, struct mem_ctl_info, link);
 
-               edac_mc_workq_setup(mci, (unsigned long) value);
+               edac_mc_workq_setup(mci, value, false);
        }
 
        mutex_unlock(&mem_ctls_mutex);
@@ -447,20 +450,16 @@ fail1:
        return 1;
 }
 
-static void complete_mc_list_del(struct rcu_head *head)
-{
-       struct mem_ctl_info *mci;
-
-       mci = container_of(head, struct mem_ctl_info, rcu);
-       INIT_LIST_HEAD(&mci->link);
-}
-
 static void del_mc_from_global_list(struct mem_ctl_info *mci)
 {
        atomic_dec(&edac_handlers);
        list_del_rcu(&mci->link);
-       call_rcu(&mci->rcu, complete_mc_list_del);
-       rcu_barrier();
+
+       /* these are for safe removal of devices from global list while
+        * NMI handlers may be traversing list
+        */
+       synchronize_rcu();
+       INIT_LIST_HEAD(&mci->link);
 }
 
 /**
@@ -543,7 +542,7 @@ int edac_mc_add_mc(struct mem_ctl_info *mci)
                /* This instance is NOW RUNNING */
                mci->op_state = OP_RUNNING_POLL;
 
-               edac_mc_workq_setup(mci, edac_mc_get_poll_msec());
+               edac_mc_workq_setup(mci, edac_mc_get_poll_msec(), true);
        } else {
                mci->op_state = OP_RUNNING_INTERRUPT;
        }