From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C278C43331 for ; Sun, 10 Nov 2019 02:56:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C87A21019 for ; Sun, 10 Nov 2019 02:56:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573354572; bh=RN5s4WwjmeKO7kh5V7ierCiAzxj8M84zs8kaJC64wO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=koWE1XYxcnwG7STg8qT9iGtC4d46ZYZCXNoLhtEpYIsXjIWVEohlXtpANFSkubKY4 MeXABGG/VQ8JJpw9DooaC93Ie6Ihu8MHGGZqonq9Td9spzxzhaJN2MCBHLdIqWqm5f qB74AEv+EGyiXoOz5JimvM4ZSDkKehWCwQDYWGfU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728859AbfKJC4K (ORCPT ); Sat, 9 Nov 2019 21:56:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:60834 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729603AbfKJCuD (ORCPT ); Sat, 9 Nov 2019 21:50:03 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 56B9922582; Sun, 10 Nov 2019 02:50:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573354202; bh=RN5s4WwjmeKO7kh5V7ierCiAzxj8M84zs8kaJC64wO4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hvENkaTDO+J7FMOonmJeQ0qekLv9pj3VCLKyCebQCYAyvwUDsLz7SfLwcqNW+29NW rsjPJv29O1VXUEq/b7vRg5TmpLIvfeMzJxsVSSt2aSpQxcNtrj7qxWGeepYqwoVYc6 jv7oK82a2bDZ8d4H7IVPqBy4dkAeSEnMFlAWFRGE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jason Yan , chenxiang , John Garry , Johannes Thumshirn , Ewan Milne , Christoph Hellwig , Tomas Henzl , Dan Williams , Hannes Reinecke , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 45/66] scsi: libsas: always unregister the old device if going to discover new Date: Sat, 9 Nov 2019 21:48:24 -0500 Message-Id: <20191110024846.32598-45-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191110024846.32598-1-sashal@kernel.org> References: <20191110024846.32598-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jason Yan [ Upstream commit 32c850bf587f993b2620b91e5af8a64a7813f504 ] If we went into sas_rediscover_dev() the attached_sas_addr was already insured not to be zero. So it's unnecessary to check if the attached_sas_addr is zero. And although if the sas address is not changed, we always have to unregister the old device when we are going to register a new one. We cannot just leave the device there and bring up the new. Signed-off-by: Jason Yan CC: chenxiang CC: John Garry CC: Johannes Thumshirn CC: Ewan Milne CC: Christoph Hellwig CC: Tomas Henzl CC: Dan Williams CC: Hannes Reinecke Reviewed-by: Johannes Thumshirn Reviewed-by: Hannes Reinecke Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/libsas/sas_expander.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 400eee9d77832..d44f18f773c0f 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -2049,14 +2049,11 @@ static int sas_rediscover_dev(struct domain_device *dev, int phy_id, bool last) return res; } - /* delete the old link */ - if (SAS_ADDR(phy->attached_sas_addr) && - SAS_ADDR(sas_addr) != SAS_ADDR(phy->attached_sas_addr)) { - SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n", - SAS_ADDR(dev->sas_addr), phy_id, - SAS_ADDR(phy->attached_sas_addr)); - sas_unregister_devs_sas_addr(dev, phy_id, last); - } + /* we always have to delete the old device when we went here */ + SAS_DPRINTK("ex %016llx phy 0x%x replace %016llx\n", + SAS_ADDR(dev->sas_addr), phy_id, + SAS_ADDR(phy->attached_sas_addr)); + sas_unregister_devs_sas_addr(dev, phy_id, last); return sas_discover_new(dev, phy_id); } -- 2.20.1