redonkable/alistair23-linux
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[SCSI] zfcp: wait on SCSI work to be finished before proceeding with init dev

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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>
This commit is contained in:
Swen Schillig 2008-10-01 12:42:25 +02:00 committed by James Bottomley
parent 9fb3cd86e4
commit 091694a556
2 changed files with 6 additions and 0 deletions
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5
drivers/s390/scsi/zfcp_aux.c
View file

@ -129,7 +129,12 @@ static void __init zfcp_init_device_configure(void)
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:

1
drivers/s390/scsi/zfcp_erp.c
View file

@ -1189,6 +1189,7 @@ static void zfcp_erp_scsi_scan(struct work_struct *work)
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);
}