Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932665AbVIMPJH (ORCPT ); Tue, 13 Sep 2005 11:09:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932661AbVIMPJH (ORCPT ); Tue, 13 Sep 2005 11:09:07 -0400 Received: from mail.cs.umn.edu ([128.101.34.202]:47342 "EHLO mail.cs.umn.edu") by vger.kernel.org with ESMTP id S932659AbVIMPJF (ORCPT ); Tue, 13 Sep 2005 11:09:05 -0400 Date: Tue, 13 Sep 2005 10:09:02 -0500 From: Dave C Boutcher To: serue@us.ibm.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, lxie@us.ibm.com, santil@us.ibm.com Subject: [Patch] ibmvscsi compatibility fix Message-ID: <20050913150902.GA22071@cs.umn.edu> Reply-To: boutcher@cs.umn.edu Mail-Followup-To: serue@us.ibm.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, lxie@us.ibm.com, santil@us.ibm.com References: <20050912024350.60e89eb1.akpm@osdl.org> <20050912222437.GA13124@sergelap.austin.ibm.com> <20050912161013.76ef833f.akpm@osdl.org> <20050913013840.GG5382@krispykreme> <20050913085643.GA24156@sergelap.austin.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050913085643.GA24156@sergelap.austin.ibm.com> User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1515 Lines: 39 Linda Xie ever so gently pointed out that she had a patch to preserve compatibility with older SLES targets, and I told her we didn't need to push it to mainline. This patch explicitly checks the version of the IBMVSCSI target and ensures that large scatterlists are not sent to older targets. Andrew, while this stuff usually goes through James, it would probably make Serge happier if you could pick it up for the next mm. Signed-off-by: Linda Xie Signed-off-by: Dave Boutcher --- linux-2.6.13-mm3-orig/drivers/scsi/ibmvscsi/ibmvscsi.c 2005-09-13 09:50:31.000000000 -0500 +++ linux-2.6.13.1/drivers/scsi/ibmvscsi/ibmvscsi.c 2005-09-13 09:09:41.000000000 -0500 @@ -727,6 +727,16 @@ if (hostdata->madapter_info.port_max_txu[0]) hostdata->host->max_sectors = hostdata->madapter_info.port_max_txu[0] >> 9; + + if (hostdata->madapter_info.os_type == 3 && + strcmp(hostdata->madapter_info.srp_version, "1.6a") <= 0) { + printk("ibmvscsi: host (Ver. %s) doesn't support large" + "transfers\n", + hostdata->madapter_info.srp_version); + printk("ibmvscsi: limiting scatterlists to %d\n", + MAX_INDIRECT_BUFS); + hostdata->host->sg_tablesize = MAX_INDIRECT_BUFS; + } } } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/