linux-kernel - [RFC 2/2] loopback: Enable TFO->complete_irq for fast-path ->scsi

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Date:	Fri, 22 May 2015 07:57:26 +0000
From:	"Nicholas A. Bellinger" <nab@...erainc.com>
To:	target-devel <target-devel@...r.kernel.org>
Cc:	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
	Sagi Grimberg <sagig@...lanox.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [RFC 2/2] loopback: Enable TFO->complete_irq for fast-path ->scsi_done

From: Nicholas Bellinger <nab@...ux-iscsi.org>

Go ahead and enable TFO->complete_irq for testing with loopback
LLD code, and avoid the extra fast-path queue_work() context
switch if no se_cmd special case handling requirements exist.

Cc: Christoph Hellwig <hch@....de>
Cc: Hannes Reinecke <hare@...e.de>
CC: Sagi Grimberg <sagig@...lanox.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
---
 drivers/target/loopback/tcm_loop.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index bd9d11a..562906a 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -1229,6 +1229,7 @@ static struct configfs_attribute *tcm_loop_wwn_attrs[] = {
 static const struct target_core_fabric_ops loop_ops = {
 	.module				= THIS_MODULE,
 	.name				= "loopback",
+	.complete_irq			= true,
 	.get_fabric_name		= tcm_loop_get_fabric_name,
 	.tpg_get_wwn			= tcm_loop_get_endpoint_wwn,
 	.tpg_get_tag			= tcm_loop_get_tag,
-- 
1.9.1

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