[SCSI] zfcp: wait on SCSI work to be finished before proceeding with init dev
Due to the character of a scheduled work we cannot guarantee the
LUN register to be finished before an initial device tries to use it.
Therefor we have to wait for PENDING_SCSI_WORK flag to be cleared
before proceeding.
Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index 05f3de6..24255e4 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -129,7 +129,12 @@
goto out_unit;
up(&zfcp_data.config_sema);
ccw_device_set_online(adapter->ccw_device);
+
zfcp_erp_wait(adapter);
+ wait_event(adapter->erp_done_wqh,
+ !(atomic_read(&unit->status) &
+ ZFCP_STATUS_UNIT_SCSI_WORK_PENDING));
+
down(&zfcp_data.config_sema);
zfcp_unit_put(unit);
out_unit:
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 4539530..26049c6 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -1189,6 +1189,7 @@
scsilun_to_int((struct scsi_lun *)&unit->fcp_lun), 0);
atomic_clear_mask(ZFCP_STATUS_UNIT_SCSI_WORK_PENDING, &unit->status);
zfcp_unit_put(unit);
+ wake_up(&unit->port->adapter->erp_done_wqh);
kfree(p);
}