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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 740BAC10F0C for ; Thu, 4 Apr 2019 08:54:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 44CA021738 for ; Thu, 4 Apr 2019 08:54:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554368048; bh=5qervVgcMwJU2T1v7a2Iedn937RYPqqwqqjiXaOa2QY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zsnxKIqT5wmzBzPrhi5aab79Hhxwj5Wfs85KyNteOBvtHb5jucQJsubU4c7e48olY vT548c5Kgzp+V2YN/+/uNM5sY4k2ouAxOXHqMIM/Kp7CYrUfN9yyZZrFcLocJXnAZ2 +iMIB4/c9vCyoUiI5uXowH0XZawkZEGzUsZXu+E8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729519AbfDDIyH (ORCPT ); Thu, 4 Apr 2019 04:54:07 -0400 Received: from mail.kernel.org ([198.145.29.99]:56644 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729218AbfDDIyF (ORCPT ); Thu, 4 Apr 2019 04:54:05 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6E71420882; Thu, 4 Apr 2019 08:54:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1554368044; bh=5qervVgcMwJU2T1v7a2Iedn937RYPqqwqqjiXaOa2QY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=APvSeVUwEnTCGOPNJGLxx+kdxzh49Mg9msvBH6s8P99ytnERZCZ8jIdtboThwi+9E rc1lWBuRvWS73kWO+p44PjwP2M34FxlDLwmMjxyTsOe3bwYspqaIYHoucgDrKXfrdc YF8FqU9PxuaRGGp9xR9QQXwa3aNd3oAOPvj1idaY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, John Garry , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 4.14 017/121] scsi: hisi_sas: Set PHY linkrate when disconnected Date: Thu, 4 Apr 2019 10:46:45 +0200 Message-Id: <20190404084546.302923215@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190404084545.245659903@linuxfoundation.org> References: <20190404084545.245659903@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit efdcad62e7b8a02fcccc5ccca57806dce1482ac8 ] When the PHY comes down, we currently do not set the negotiated linkrate: root@(none)$ pwd /sys/class/sas_phy/phy-0:0 root@(none)$ more enable 1 root@(none)$ more negotiated_linkrate 12.0 Gbit root@(none)$ echo 0 > enable root@(none)$ more negotiated_linkrate 12.0 Gbit root@(none)$ This patch fixes the driver code to set it properly when the PHY comes down. If the PHY had been enabled, then set unknown; otherwise, flag as disabled. The logical place to set the negotiated linkrate for this scenario is PHY down routine, which is called from the PHY down ISR. However, it is not possible to know if the PHY comes down due to PHY disable or loss of link, as sas_phy.enabled member is not set until after the transport disable routine is complete, which races with the PHY down ISR. As an imperfect solution, use sas_phy_data.enable as the flag to know if the PHY is down due to disable. It's imperfect, as sas_phy_data is internal to libsas. I can't see another way without adding a new field to hisi_sas_phy and managing it, or changing SCSI SAS transport. Signed-off-by: John Garry Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/hisi_sas/hisi_sas_main.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 8fa9bb336ad4..b167411580ba 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -10,6 +10,7 @@ */ #include "hisi_sas.h" +#include "../libsas/sas_internal.h" #define DRV_NAME "hisi_sas" #define DEV_IS_GONE(dev) \ @@ -1508,9 +1509,18 @@ static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy) static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy) { + struct asd_sas_phy *sas_phy = &phy->sas_phy; + struct sas_phy *sphy = sas_phy->phy; + struct sas_phy_data *d = sphy->hostdata; + phy->phy_attached = 0; phy->phy_type = 0; phy->port = NULL; + + if (d->enable) + sphy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; + else + sphy->negotiated_linkrate = SAS_PHY_DISABLED; } void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy) -- 2.19.1