From patchwork Thu Jan 27 11:21:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Usyskin X-Patchwork-Id: 12726599 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 9DFD8C433F5 for ; Thu, 27 Jan 2022 11:21:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 25BA210EF66; Thu, 27 Jan 2022 11:21:46 +0000 (UTC) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0572910EF66 for ; Thu, 27 Jan 2022 11:21:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643282504; x=1674818504; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=TLkqMr2jx01CyRrqkRPNdsu/Li2EYBHMmZncYyPe5+g=; b=XTDRIa3TtzwkuZQ46L7jjZkPFCPweznlbCBJUCUkp/VWr9j0n9oPiPi+ X6Mbx3duFzDikhUCTXsgmqSTqPUpQB+LbOeUeX4wJuvKvbAlGwsNZnl89 RBA36W1inlt04/DVatyWpXys3ruhO6qIAv9Sc/pQfT+AjhEVjPtrqqycz TLd5jxO7ikOA0aos7cjJWawKsBqc+g9s1O/XP74pKSlZsbX3jdHew3E0d 4zQwmUciaWbE/6ZyQ068rCwWYMCaGVEU02ruRVvtav3TEVGG561roWJq+ jPrp1z9Bt92wd/sCQBq2zWlyWGqHg6d7+/ncMVT7k5/B/BbIaC7vvKHIg Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10239"; a="271277571" X-IronPort-AV: E=Sophos;i="5.88,320,1635231600"; d="scan'208";a="271277571" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jan 2022 03:21:44 -0800 X-IronPort-AV: E=Sophos;i="5.88,320,1635231600"; d="scan'208";a="480253250" Received: from sannilnx.jer.intel.com ([10.12.231.79]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jan 2022 03:21:42 -0800 From: Alexander Usyskin To: Greg Kroah-Hartman , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , David Airlie , Daniel Vetter Date: Thu, 27 Jan 2022 13:21:01 +0200 Message-Id: <20220127112103.2336871-4-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220127112103.2336871-1-alexander.usyskin@intel.com> References: <20220127112103.2336871-1-alexander.usyskin@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 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 --- 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);