From: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
To: linux-scsi <linux-scsi@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Vasu Dev <vasu.dev@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>, Andi Kleen <ak@linux>
Cc: James Smart <james.smart@emulex.com>,
Andrew Vasquez <andrew.vasquez@qlogic.com>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
Hannes Reinecke <hare@suse.de>, Joe Eykholt <jeykholt@cisco.com>,
Christoph Hellwig <hch@lst.de>, Jon Hawley <warthog9@kernel.org>,
MPTFusionLinux <DL-MPTFusionLinux@lsi.com>,
"eata.c maintainer" <dario.ballabio@inwind.it>,
Luben Tuikov <ltuikov@yahoo.com>,
mvsas maintainer <kewei@marvell.com>,
pm8001 maintainer Jack Wang <jack_wang@usish.com>,
Nicholas Bellinger <nab@linux-iscsi.org>
Subject: [RFC v4 04/19] aic94xx: Set SHT->unlocked_qcmd=1 for libsas queuecommand()
Date: Mon, 27 Sep 2010 19:05:41 -0700 [thread overview]
Message-ID: <1285639541-7284-1-git-send-email-nab@linux-iscsi.org> (raw)
From: Nicholas Bellinger <nab@linux-iscsi.org>
This patch updates aic94xx to set struct scsi_host_template->unlocked_qcmd=1
because it is using generic libsas sas_queuecommand() code which now can be
run without struct Scsi_Host->host_lock held following the original
host_lock unlock -> do_work() -> lock optimization in sas_queuecommand().
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/scsi/aic94xx/aic94xx_init.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/aic94xx/aic94xx_init.c b/drivers/scsi/aic94xx/aic94xx_init.c
index 3b7e83d..b236d720 100644
--- a/drivers/scsi/aic94xx/aic94xx_init.c
+++ b/drivers/scsi/aic94xx/aic94xx_init.c
@@ -77,6 +77,7 @@ static struct scsi_host_template aic94xx_sht = {
.can_queue = 1,
.cmd_per_lun = 1,
.this_id = -1,
+ .unlocked_qcmd = 1,
.sg_tablesize = SG_ALL,
.max_sectors = SCSI_DEFAULT_MAX_SECTORS,
.use_clustering = ENABLE_CLUSTERING,
--
1.7.3
reply other threads:[~2010-09-28 2:05 UTC|newest]
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