From patchwork Tue Mar 8 16:36:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Usyskin X-Patchwork-Id: 12774014 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6A302C433FE for ; Tue, 8 Mar 2022 16:39:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CD32910E61E; Tue, 8 Mar 2022 16:39:03 +0000 (UTC) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id E71A410E60F for ; Tue, 8 Mar 2022 16:39:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1646757540; x=1678293540; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=TLkqMr2jx01CyRrqkRPNdsu/Li2EYBHMmZncYyPe5+g=; b=CeujhrUqk9w1UPBlobhl9oun+nTn2rfDdOgEWKnQxqxmlcqsPOZZ4Hj7 jvu8nFCOjWGgRQP9xi3P+THgao3VfJfIL6TqfuXhvd3Bf8WIPtWRq/ORR ca2BlpyWCUM4H3CuuyWvIDm7dp1lzjXoIYQqU/5MgRvVhUaE7IBnIwzTz RInv26B1LJc0o2bgXICl/XRLGc39jT0y4732W0g0TDcxGs/piwQKmgxtV 0guB8dHqdUTWzz+JXifpy7sZY/1xbua9dm0+kZyUUUwYeZN4+YMZbEVan 7kM7fL5VaamvMUEwnvEo4thorq4BDkpqKyYnkpvbD1sUkNJLupJh+EFso A==; X-IronPort-AV: E=McAfee;i="6200,9189,10280"; a="252305025" X-IronPort-AV: E=Sophos;i="5.90,165,1643702400"; d="scan'208";a="252305025" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2022 08:38:30 -0800 X-IronPort-AV: E=Sophos;i="5.90,165,1643702400"; d="scan'208";a="537630938" Received: from sannilnx.jer.intel.com ([10.12.231.73]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2022 08:38:16 -0800 From: Alexander Usyskin To: Greg Kroah-Hartman , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter , Tvrtko Ursulin Date: Tue, 8 Mar 2022 18:36:52 +0200 Message-Id: <20220308163654.942820-4-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220308163654.942820-1-alexander.usyskin@intel.com> References: <20220308163654.942820-1-alexander.usyskin@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v10 3/5] mei: gsc: setup char driver alive in spite of firmware handshake failure X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, Tomas Winkler , Alexander Usyskin , Vitaly Lubart , intel-gfx@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Setup char device in spite of firmware handshake failure. In order to provide host access to the firmware status registers and other information required for the manufacturing process. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Reviewed-by: Daniele Ceraolo Spurio --- drivers/misc/mei/gsc-me.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c index 0afae70e0609..cf427f6fdec9 100644 --- a/drivers/misc/mei/gsc-me.c +++ b/drivers/misc/mei/gsc-me.c @@ -79,11 +79,12 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev, pm_runtime_set_active(device); pm_runtime_enable(device); - if (mei_start(dev)) { - dev_err(device, "init hw failure.\n"); - ret = -ENODEV; - goto err; - } + /* Continue to char device setup in spite of firmware handshake failure. + * In order to provide access to the firmware status registers to the user + * space via sysfs. + */ + if (mei_start(dev)) + dev_warn(device, "init hw failure.\n"); pm_runtime_set_autosuspend_delay(device, MEI_GSC_RPM_TIMEOUT); pm_runtime_use_autosuspend(device);