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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CDEEC433EF for ; Wed, 13 Oct 2021 07:46:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF71761077 for ; Wed, 13 Oct 2021 07:46:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238587AbhJMHsP (ORCPT ); Wed, 13 Oct 2021 03:48:15 -0400 Received: from mga14.intel.com ([192.55.52.115]:21694 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238509AbhJMHsO (ORCPT ); Wed, 13 Oct 2021 03:48:14 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10135"; a="227657473" X-IronPort-AV: E=Sophos;i="5.85,369,1624345200"; d="scan'208";a="227657473" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2021 00:46:04 -0700 X-IronPort-AV: E=Sophos;i="5.85,369,1624345200"; d="scan'208";a="563016609" Received: from twinkler-lnx.jer.intel.com ([10.12.91.138]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Oct 2021 00:46:02 -0700 From: Tomas Winkler To: Greg Kroah-Hartman Cc: Alexander Usyskin , Vitaly Lubart , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tomas Winkler Subject: [char-misc-next] mei: hbm: drop hbm responses on early shutdown Date: Wed, 13 Oct 2021 10:45:52 +0300 Message-Id: <20211013074552.2278419-1-tomas.winkler@intel.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alexander Usyskin Drop HBM responses also in the early shutdown phase where the usual traffic is allowed. Extend the rule that drop HBM responses received during the shutdown phase by also in MEI_DEV_POWERING_DOWN state. This resolves the stall if the driver is stopping in the middle of the link init or link reset. Fixes: da3eb47c90d4 ("mei: hbm: drop hbm responses on shutdown") Fixes: 36edb1407c3c ("mei: allow clients on bus to communicate in remove callback") Cc: # v5.12+ Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler --- drivers/misc/mei/hbm.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 99b5c1ecc444..be41843df75b 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -1298,7 +1298,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) if (dev->dev_state != MEI_DEV_INIT_CLIENTS || dev->hbm_state != MEI_HBM_STARTING) { - if (dev->dev_state == MEI_DEV_POWER_DOWN) { + if (dev->dev_state == MEI_DEV_POWER_DOWN || + dev->dev_state == MEI_DEV_POWERING_DOWN) { dev_dbg(dev->dev, "hbm: start: on shutdown, ignoring\n"); return 0; } @@ -1381,7 +1382,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) if (dev->dev_state != MEI_DEV_INIT_CLIENTS || dev->hbm_state != MEI_HBM_DR_SETUP) { - if (dev->dev_state == MEI_DEV_POWER_DOWN) { + if (dev->dev_state == MEI_DEV_POWER_DOWN || + dev->dev_state == MEI_DEV_POWERING_DOWN) { dev_dbg(dev->dev, "hbm: dma setup response: on shutdown, ignoring\n"); return 0; } @@ -1448,7 +1450,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) if (dev->dev_state != MEI_DEV_INIT_CLIENTS || dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) { - if (dev->dev_state == MEI_DEV_POWER_DOWN) { + if (dev->dev_state == MEI_DEV_POWER_DOWN || + dev->dev_state == MEI_DEV_POWERING_DOWN) { dev_dbg(dev->dev, "hbm: properties response: on shutdown, ignoring\n"); return 0; } @@ -1490,7 +1493,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) if (dev->dev_state != MEI_DEV_INIT_CLIENTS || dev->hbm_state != MEI_HBM_ENUM_CLIENTS) { - if (dev->dev_state == MEI_DEV_POWER_DOWN) { + if (dev->dev_state == MEI_DEV_POWER_DOWN || + dev->dev_state == MEI_DEV_POWERING_DOWN) { dev_dbg(dev->dev, "hbm: enumeration response: on shutdown, ignoring\n"); return 0; } -- 2.31.1