From: Christof Schmitt <christof.schmitt@de.ibm.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: linux-scsi@vger.kernel.org, linux-s390@vger.kernel.org,
schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
Swen Schillig <swen@vnet.ibm.com>,
Christof Schmitt <christof.schmitt@de.ibm.com>
Subject: [patch 12/13] zfcp: wait on SCSI work to be finished before proceeding with init dev
Date: Wed, 01 Oct 2008 12:42:25 +0200 [thread overview]
Message-ID: <20081001104805.918759000@de.ibm.com> (raw)
In-Reply-To: 20081001104213.585200000@de.ibm.com
[-- Attachment #1: zfcp_wait_on_initial_lun_avail.diff --]
[-- Type: text/plain, Size: 1433 bytes --]
From: Swen Schillig <swen@vnet.ibm.com>
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>
---
drivers/s390/scsi/zfcp_aux.c | 5 +++++
drivers/s390/scsi/zfcp_erp.c | 1 +
2 files changed, 6 insertions(+)
--- a/drivers/s390/scsi/zfcp_aux.c 2008-09-30 13:52:06.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_aux.c 2008-09-30 13:52:38.000000000 +0200
@@ -129,7 +129,12 @@ static void __init zfcp_init_device_conf
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:
--- a/drivers/s390/scsi/zfcp_erp.c 2008-09-30 13:52:30.000000000 +0200
+++ b/drivers/s390/scsi/zfcp_erp.c 2008-09-30 13:52:38.000000000 +0200
@@ -1189,6 +1189,7 @@ static void zfcp_erp_scsi_scan(struct wo
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);
}
--
next prev parent reply other threads:[~2008-10-01 10:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-01 10:42 [patch 00/13] zfcp updates for 2.6.28 Christof Schmitt
2008-10-01 10:42 ` [patch 01/13] zfcp: add queue_full sysfs attribute Christof Schmitt
2008-10-01 10:42 ` [patch 02/13] zfcp: Update message with input from review Christof Schmitt
2008-10-01 10:42 ` [patch 03/13] zfcp: remove unused references, declarations and flags Christof Schmitt
2008-10-01 10:42 ` [patch 04/13] zfcp: attach and release SAN nameserver port on demand Christof Schmitt
2008-10-01 10:42 ` [patch 05/13] zfcp: remove all typedefs and replace them with standards Christof Schmitt
2008-10-01 10:42 ` [patch 06/13] zfcp: Simplify get_adapter_by_busid Christof Schmitt
2008-10-01 10:42 ` [patch 07/13] zfcp: Simplify zfcp data structures Christof Schmitt
2008-10-01 10:42 ` [patch 08/13] zfcp: put threshold data in hba trace Christof Schmitt
2008-10-01 10:42 ` [patch 09/13] zfcp: deadlock via shared work queue tasks Christof Schmitt
2008-10-01 10:42 ` [patch 10/13] zfcp: prevent fc_remote_port_delete calls for unregistered rport Christof Schmitt
2008-10-01 10:42 ` [patch 11/13] zfcp: fix erp list usage without using locks Christof Schmitt
2008-10-01 10:42 ` Christof Schmitt [this message]
2008-10-01 10:42 ` [patch 13/13] zfcp: fix double dbf id usage Christof Schmitt
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