[SCSI] ibmvfc: Fix rport add/delete race resulting in oops

Commit 43c8da907ccc656935d1085701f4db83385d8a59 introduced a race
condition which can occur when adding/deleting rports. There are
two possible threads now that can be deleting rports in the ibmvfc
driver, which can result in list_del being called twice, resulting
in an oops. This patch adds a new state to the ibmvfc_target struct
to indicate the target has been removed from the list and is in
the process of being deleted.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h
index d7e8dcd90650..af48172112fa 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.h
+++ b/drivers/scsi/ibmvscsi/ibmvfc.h
@@ -597,6 +597,7 @@ enum ibmvfc_target_action {
         IBMVFC_TGT_ACTION_INIT,
         IBMVFC_TGT_ACTION_INIT_WAIT,
         IBMVFC_TGT_ACTION_DEL_RPORT,
+        IBMVFC_TGT_ACTION_DELETED_RPORT,
 };
 
 struct ibmvfc_target {