linux-kernel - [PATCH 4.9 19/60] ibmvscsis: Add SGL limit

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Message-Id: <20170213130335.766218303@linuxfoundation.org>
Date:   Mon, 13 Feb 2017 05:03:51 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Steven Royer <seroyer@...ux.vnet.ibm.com>,
        "Bryant G. Ly" <bryantly@...ux.vnet.ibm.com>,
        Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 4.9 19/60] ibmvscsis: Add SGL limit

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bryant G. Ly <bryantly@...ux.vnet.ibm.com>

commit b22bc27868e8c11fe3f00937a341b44f80b50364 upstream.

This patch adds internal LIO sgl limit since the driver already
sets a max transfer limit on transport layer of 1MB to the client.

Tested-by: Steven Royer <seroyer@...ux.vnet.ibm.com>
Signed-off-by: Bryant G. Ly <bryantly@...ux.vnet.ibm.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -3929,6 +3929,7 @@ static struct configfs_attribute *ibmvsc
 static const struct target_core_fabric_ops ibmvscsis_ops = {
 	.module				= THIS_MODULE,
 	.name				= "ibmvscsis",
+	.max_data_sg_nents		= MAX_TXU / PAGE_SIZE,
 	.get_fabric_name		= ibmvscsis_get_fabric_name,
 	.tpg_get_wwn			= ibmvscsis_get_fabric_wwn,
 	.tpg_get_tag			= ibmvscsis_get_tag,