linux-kernel - [PATCH 3/3] tcm: Add XDWRITEREAD

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Date:	Tue, 21 Sep 2010 23:09:01 -0700
From:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To:	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Boaz Harrosh <bharrosh@...asas.com>
Cc:	James Bottomley <James.Bottomley@...e.de>,
	Douglas Gilbert <dgilbert@...erlog.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Mike Christie <michaelc@...wisc.edu>,
	Hannes Reinecke <hare@...e.de>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 3/3] tcm: Add XDWRITEREAD_10 passthrough support

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

This patch adds the simple check for TCM/pSCSI usage with XDWRITE_READ10
to follow commit ba3d8e3f13 and perform the BIDI-COMMAND passthrough.

Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
---
 drivers/target/target_core_transport.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index e514ffc..6976f93 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -5566,6 +5566,13 @@ static int transport_generic_cmd_sequencer(
 		transport_get_maps(cmd);
 		cmd->transport_split_cdb = &split_cdb_XX_10;
 		cmd->transport_get_lba = &transport_lba_32;
+		passthrough = (TRANSPORT(dev)->transport_type ==
+				TRANSPORT_PLUGIN_PHBA_PDEV);
+		/*
+		 * Skip the remaining assignments for TCM/PSCSI passthrough
+		 */
+		if (passthrough)
+			break;
 		/*
 		 * Setup BIDI XOR callback to be run during transport_generic_complete_ok()
 		 */
-- 
1.5.6.5

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