[PATCH 19/28] staging/lustre/llite: ensure obd is effective in onu_upcall

From: Yang Sheng The watched obd device may still not setup while onu_upcall invoked. So we need verify it in cl_ocd_update. Signed-off-by: Yang Sheng Reviewed-on: http://review.whamcloud.com/19597 Intel-bug-id:

[PATCH 19/28] staging/lustre/llite: ensure obd is effective in onu_upcall

From: Yang Sheng The watched obd device may still not setup while onu_upcall invoked. So we need verify it in cl_ocd_update. Signed-off-by: Yang Sheng Reviewed-on: http://review.whamcloud.com/19597 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8027 Reviewed-by: Niu Yawei Reviewed-by: