From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Williams Subject: [PATCH 03/24] scsi: use drain_workqueue Date: Fri, 16 Dec 2011 18:33:23 -0800 Message-ID: <20111217023323.15036.67609.stgit@localhost6.localdomain6> References: <20111217022912.15036.85808.stgit@localhost6.localdomain6> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from mga03.intel.com ([143.182.124.21]:13547 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760698Ab1LQCdY (ORCPT ); Fri, 16 Dec 2011 21:33:24 -0500 In-Reply-To: <20111217022912.15036.85808.stgit@localhost6.localdomain6> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: linux-ide@vger.kernel.org, Mike Christie , Robert Love Use 'drain' versus 'flush' as the former additionally flushes chained operations. libsas uses chained operations when it posts discovery work in response to a port event. As a result the hardcoded double-flush can be removed from the isci driver. Cc: Mike Christie Cc: Robert Love Signed-off-by: Dan Williams --- drivers/scsi/hosts.c | 8 ++++---- drivers/scsi/isci/host.c | 3 --- include/scsi/scsi_host.h | 2 +- 3 files changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index 351dc0b..37155d1 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -564,19 +564,19 @@ int scsi_queue_work(struct Scsi_Host *shost, struct work_struct *work) EXPORT_SYMBOL_GPL(scsi_queue_work); /** - * scsi_flush_work - Flush a Scsi_Host's workqueue. + * scsi_flush_work - Drain a Scsi_Host's workqueue. * @shost: Pointer to Scsi_Host. **/ -void scsi_flush_work(struct Scsi_Host *shost) +int scsi_flush_work(struct Scsi_Host *shost) { if (!shost->work_q) { printk(KERN_ERR "ERROR: Scsi host '%s' attempted to flush scsi-work, " "when no workqueue created.\n", shost->hostt->name); dump_stack(); - return; + return 0; } - flush_workqueue(shost->work_q); + return drain_workqueue(shost->work_q); } EXPORT_SYMBOL_GPL(scsi_flush_work); diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index e7fe9c4..240779a 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -655,9 +655,6 @@ int isci_host_scan_finished(struct Scsi_Host *shost, unsigned long time) if (test_bit(IHOST_START_PENDING, &ihost->flags)) return 0; - /* todo: use sas_flush_discovery once it is upstream */ - scsi_flush_work(shost); - scsi_flush_work(shost); dev_dbg(&ihost->pdev->dev, diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 50266c9..505bc34 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -770,7 +770,7 @@ static inline int scsi_host_in_recovery(struct Scsi_Host *shost) } extern int scsi_queue_work(struct Scsi_Host *, struct work_struct *); -extern void scsi_flush_work(struct Scsi_Host *); +extern int scsi_flush_work(struct Scsi_Host *); extern struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *, int); extern int __must_check scsi_add_host_with_dma(struct Scsi_Host *,