EDAC: Balance workqueue setup and teardown
We use the ->edac_check function pointers to determine whether we need
to setup a polling workqueue. However, the destroy path is not balanced
and we might try to teardown an unitialized workqueue.
Balance init and destroy paths by looking at ->edac_check in both cases.
Set op_state to OP_OFFLINE *before* destroying anything.
Reported-by: Zhiqiang Hou <Zhiqiang.Hou@freescale.com>
Cc: Varun Sethi <Varun.Sethi@freescale.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 8adfc16..50802c1 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -583,8 +583,6 @@
*/
static void edac_mc_workq_teardown(struct mem_ctl_info *mci)
{
- mci->op_state = OP_OFFLINE;
-
edac_stop_work(&mci->work);
}
@@ -772,7 +770,7 @@
}
/* If there IS a check routine, then we are running POLLED */
- if (mci->edac_check != NULL) {
+ if (mci->edac_check) {
/* This instance is NOW RUNNING */
mci->op_state = OP_RUNNING_POLL;
@@ -823,15 +821,16 @@
return NULL;
}
+ /* mark MCI offline: */
+ mci->op_state = OP_OFFLINE;
+
if (!del_mc_from_global_list(mci))
edac_mc_owner = NULL;
+
mutex_unlock(&mem_ctls_mutex);
- /* flush workq processes */
- edac_mc_workq_teardown(mci);
-
- /* marking MCI offline */
- mci->op_state = OP_OFFLINE;
+ if (mci->edac_check)
+ edac_mc_workq_teardown(mci);
/* remove from sysfs */
edac_remove_sysfs_mci_device(mci);