From: Dan Williams <dan.j.williams@intel.com>
To: linux-scsi@vger.kernel.org
Cc: linux-ide@vger.kernel.org, Mike Christie <michaelc@cs.wisc.edu>,
Robert Love <robert.w.love@intel.com>
Subject: [PATCH 03/24] scsi: use drain_workqueue
Date: Fri, 16 Dec 2011 18:33:23 -0800 [thread overview]
Message-ID: <20111217023323.15036.67609.stgit@localhost6.localdomain6> (raw)
In-Reply-To: <20111217022912.15036.85808.stgit@localhost6.localdomain6>
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 <michaelc@cs.wisc.edu>
Cc: Robert Love <robert.w.love@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
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 *,
next prev parent reply other threads:[~2011-12-17 2:33 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-17 2:33 [PATCH 00/24] libsas: eh reworks (ata-eh vs discovery, races, ...) Dan Williams
2011-12-17 2:33 ` [PATCH 01/24] workqueue: promote workqueue_lock to hard-irq safe Dan Williams
2011-12-17 2:33 ` [PATCH 02/24] workqueue: defer work to a draining queue Dan Williams
2011-12-19 21:49 ` Tejun Heo
2011-12-19 22:01 ` Dan Williams
2011-12-19 22:08 ` Tejun Heo
2011-12-19 22:25 ` Williams, Dan J
2011-12-17 2:33 ` Dan Williams [this message]
2011-12-17 2:33 ` [PATCH 04/24] libsas: remove unused ata_task_resp fields Dan Williams
2011-12-17 12:51 ` Sergei Shtylyov
2011-12-19 1:38 ` Jack Wang
2011-12-17 2:33 ` [PATCH 05/24] libsas: kill sas_slave_destroy Dan Williams
2011-12-17 2:33 ` [PATCH 06/24] libsas: fix domain_device leak Dan Williams
2011-12-19 2:32 ` Jack Wang
2011-12-17 2:33 ` [PATCH 07/24] libsas: fix leak of dev->sata_dev.identify_[packet_]device Dan Williams
2011-12-19 2:38 ` Jack Wang
2011-12-17 2:33 ` [PATCH 08/24] libsas: replace event locks with atomic bitops Dan Williams
2011-12-17 2:33 ` [PATCH 09/24] libsas: remove ata_port.lock management duties from lldds Dan Williams
2011-12-17 2:33 ` [PATCH 10/24] libsas: prevent domain rediscovery competing with ata error handling Dan Williams
2011-12-17 2:34 ` [PATCH 11/24] libsas: use ->set_dmamode to notify lldds of NCQ parameters Dan Williams
2011-12-17 2:34 ` [PATCH 12/24] libsas: kill invocation of scsi_eh_finish_cmd from sas_ata_task_done Dan Williams
2011-12-17 2:34 ` [PATCH 13/24] libsas: close error handling vs sas_ata_task_done() race Dan Williams
2011-12-17 2:34 ` [PATCH 14/24] libsas: prevent double completion of scmds from eh Dan Williams
2011-12-17 13:08 ` Sergei Shtylyov
2011-12-18 19:19 ` Dan Williams
2011-12-17 13:13 ` Sergei Shtylyov
2011-12-18 19:24 ` Dan Williams
2011-12-17 2:34 ` [PATCH 15/24] libsas: fix timeout vs completion race Dan Williams
2011-12-17 2:34 ` [PATCH 16/24] libsas: let libata handle command timeouts Dan Williams
2011-12-17 2:34 ` [PATCH 17/24] libsas: defer SAS_TASK_NEED_DEV_RESET commands to libata Dan Williams
2011-12-17 2:34 ` [PATCH 18/24] libsas: use libata-eh-reset for sata rediscovery fis transmit failures Dan Williams
2011-12-17 2:34 ` [PATCH 19/24] libsas: execute transport link resets with libata-eh via host workqueue Dan Williams
2011-12-17 2:34 ` [PATCH 20/24] libsas: sas_phy_enable via transport_sas_phy_reset Dan Williams
2011-12-17 2:34 ` [PATCH 21/24] libsas: Remove redundant phy state notification calls Dan Williams
2011-12-17 2:35 ` [PATCH 22/24] libsas: add mutex for SMP task execution Dan Williams
2011-12-17 2:35 ` [PATCH 23/24] libsas: async ata-eh Dan Williams
2011-12-17 2:35 ` [PATCH 24/24] libsas: poll for ata device readiness after reset Dan Williams
2011-12-20 6:18 ` Jack Wang
2011-12-20 7:08 ` Williams, Dan J
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