From patchwork Wed Jul 8 09:05:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hannes Reinecke X-Patchwork-Id: 6743051 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 29829C05AC for ; Wed, 8 Jul 2015 09:08:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6768E20675 for ; Wed, 8 Jul 2015 09:08:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AA74A20722 for ; Wed, 8 Jul 2015 09:08:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934891AbbGHJIf (ORCPT ); Wed, 8 Jul 2015 05:08:35 -0400 Received: from cantor2.suse.de ([195.135.220.15]:35903 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934499AbbGHJG2 (ORCPT ); Wed, 8 Jul 2015 05:06:28 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id B08DDACB1; Wed, 8 Jul 2015 09:06:24 +0000 (UTC) From: Hannes Reinecke To: James Bottomley Cc: Christoph Hellwig , linux-scsi@vger.kernel.org, "Martin K. Petersen" , Bart van Assche , Hannes Reinecke Subject: [PATCH 01/20] scsi_dh_alua: Disable ALUA handling for non-disk devices Date: Wed, 8 Jul 2015 11:05:59 +0200 Message-Id: <1436346378-96518-2-git-send-email-hare@suse.de> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1436346378-96518-1-git-send-email-hare@suse.de> References: <1436346378-96518-1-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-7.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Non-disk devices might support ALUA, but the firmware implementation is untested and frequently broken. As we're don't actually need it disable ALUA support for non-disk device for now. Signed-off-by: Hannes Reinecke Reviewed-by: Bart Van Assche --- drivers/scsi/device_handler/scsi_dh_alua.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index cc2773b..7d01ef0 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -320,6 +320,18 @@ static int alua_check_tpgs(struct scsi_device *sdev, struct alua_dh_data *h) { int err = SCSI_DH_OK; + /* + * ALUA support for non-disk devices is fraught with + * difficulties, so disable it for now. + */ + if (sdev->type != TYPE_DISK) { + h->tpgs = TPGS_MODE_NONE; + sdev_printk(KERN_INFO, sdev, + "%s: disable for non-disk devices\n", + ALUA_DH_NAME); + return SCSI_DH_DEV_UNSUPP; + } + h->tpgs = scsi_device_tpgs(sdev); switch (h->tpgs) { case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT: