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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 11E37C4453A for ; Wed, 22 Jul 2026 10:03:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=keKA3TlG+DaLEUEaEDJmog5OO6jAFV1sLmP/aGQcwRA=; b=gNH4WhycnN3PBK7CcDfJbzZikU yMpxT14U4MoDi6+BF0DVsekDNQ8kTDIWm8e88YehKlFBkBduFc3XIErT+qpMdU9BKIDuUtPFK3e+Y 2LDw1JntOMwfxIun8iEaEMzfBGcyAnoB/itmSFy2fdjdI2iQ1Q2g1AYgsTrTW2122drIGCAyLsaGf ebM16uvMEFF6zsCRQdxcJKvd2ye7G4jK3RYGKQ60EG3Og1RkLwiBxzy/wJPW+Ux8nzDvlnI4T9Lis eIQmmWnQHB+vLCqzhq4B/1fdWVTJNHwwvWmYmqeyduVLxfpe2UqIAP/Ufhr/hEhi1ytirXar/+wo+ Im5Sq8uw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wmTnD-0000000BURq-0tZZ; Wed, 22 Jul 2026 10:03:11 +0000 Received: from fhigh-b5-smtp.messagingengine.com ([202.12.124.156]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wmTnA-0000000BUQX-0Wkd for linux-arm-kernel@lists.infradead.org; Wed, 22 Jul 2026 10:03:09 +0000 Received: from phl-compute-06.internal (phl-compute-06.internal [10.202.2.46]) by mailfhigh.stl.internal (Postfix) with ESMTP id B33BD7A00FD; Wed, 22 Jul 2026 06:03:04 -0400 (EDT) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-06.internal (MEProxy); Wed, 22 Jul 2026 06:03:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jannau.net; h=cc :cc:content-type:content-type:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:subject :subject:to:to; s=fm1; t=1784714584; x=1784800984; bh=keKA3TlG+D aLEUEaEDJmog5OO6jAFV1sLmP/aGQcwRA=; b=JRhtTuVEliUcZMjRNFdamt8xk0 cR++RlzQH6z8VjhM6yg1tso36vYeUGFDsDC3JfPjSfoV8iHV9n2cw6aguii0BVfv CwNsZMYITuAiG9aKOvoYn1YANhorVhjrRFAizhKZEvtrcpmjfBjpbDReVIidSehr ckdSX5PQlqlNoRW73xGJvpVzPZeo4diwRtp9gTKELNEcAStQ586Hi7H6EJYNpphG AT1y4Qw+qXx+TBXAJFABeA6kieyHVefsoqvZGUgujeDlCGQi6duUUaMd3sT8k5me iRLay5O8ofeR7NmNMk3xE8VFLtJIzqMLQF9P6+hOKcRrJXwVKeVs9zBbVZYg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:content-type:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:subject:subject:to :to:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; t= 1784714584; x=1784800984; bh=keKA3TlG+DaLEUEaEDJmog5OO6jAFV1sLmP /aGQcwRA=; b=DD/hIJHCfnM5x57RyHoh5f9AQMTIcB7DPor0TEDiu6j7dm3Ma0l KkQO6hYHCe/jT2GjwdL+tSUmmQijdLjwG1hPxyO1sJx52PyvXESqYR1260IOHC7d x3U5D07/1cyqSvjLlHaa38F3L6Avex/xLPzsj7+twRMnHHyBcdliMNAMRfQWxsgG 9Ji61ZzcJAxI/U3fMFWJERWcMfZItASAI2MIjkre4ly4Pia/aesbh34THbjIeM0B zaMeX8sLTVXrRNgk0Urk+lxka8FM3JE1xPC0HYF8m0uBcEKXJ4GKPXbhUHjgIwNb oXLBoZrMpr8vbdgXUaOlcl7NqaLpxTUkCyQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTFMHwcTuNUz+Dcyz4D6Eq3Ysli2skDtxz3i8YUC46qtzqdEaZEA3XhE58UAQKCIxg 8WwMgfQJVjUb9e6CGiVSPzkF/1zRCVGoCwyv6/SYTO5SGpHIM2laUyY9O5u+1/YhFgSsEe ImAxI33mVE1jDPhNk6jQV1GB1SsqUtD77jLpI+2pX/PT4TiE0UeBzTXZgi5bQ5/BZQHjMo WZs3sxHWiO/P3X0RA6BKW1YLqXwYJr6xq2Q/oftQ7WhWQcYiD1sBjWOOXvRSuJEbBpa42w OyIK0OJADwqzymSV3W5ANqZecViPgytan5OrBwnlHtbA1dB4wX5rqw/IMRnVB4f9GGbyTD B/UGbJJmkilsTCD6V4AeeGXe3zZfZ4oWQpTSfgld0wWNbp6V+8oSgZhldSRf9uzjPa8lXt 0dpwvazIlr75A3gICNKnqycyWmfIuT4wZMh46PVqNCSdX2TN2dr+kxcigbj5Rf0vSfqZa9 Q0s8s/L8d8USfmHVvRe7ub35Q46SLmLI8YUH7cuZj7zuJZDccO8LhQZ5kjbXEzjrdOuS4v ykPBtQAAFxiawcm2VkhsX9tn0aCfvYyGPwxVlrthqiUlURscdxsh2oI6ONBGTjGKIww0I7 liEjVoIWNpBCeGO2leyqZVPXoLtcNwb5DwOfb0kbcyVQnmnegVkts/LOaecA X-ME-Proxy: Feedback-ID: i47b949f6:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 22 Jul 2026 06:03:03 -0400 (EDT) Date: Wed, 22 Jul 2026 12:03:02 +0200 From: Janne Grunau To: Sven Peter Cc: Neal Gompa , Lee Jones , asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel test robot Subject: Re: [PATCH] mfd: macsmc: Fix key count endianness annotation Message-ID: <20260722100302.GA4159739@robin.jannau.net> References: <20260719-b4-macsmc-be32-fix-v1-1-c7b1936307fa@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260719-b4-macsmc-be32-fix-v1-1-c7b1936307fa@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260722_030308_356598_231B76D8 X-CRM114-Status: GOOD ( 18.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Jul 19, 2026 at 03:00:32PM +0200, Sven Peter wrote: > SMC firmware returns the value of the #KEY key in big-endian unlike most > other keys. Reading it through apple_smc_read_u32() into a plain u32 > and then converting with be32_to_cpu() makes sparse complain: > > drivers/mfd/macsmc.c:462:26: sparse: cast to restricted __be32 > > Read the raw value into a __be32 using apple_smc_read() instead. > > Fixes: e038d985c982 ("mfd: Add Apple Silicon System Management Controller") > Reported-by: kernel test robot > Closes: https://lore.kernel.org/oe-kbuild-all/202607181046.OANjIoqR-lkp@intel.com/ > Signed-off-by: Sven Peter > --- > drivers/mfd/macsmc.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/drivers/mfd/macsmc.c b/drivers/mfd/macsmc.c > index 358feec2d088..514cba7dc897 100644 > --- a/drivers/mfd/macsmc.c > +++ b/drivers/mfd/macsmc.c > @@ -410,7 +410,7 @@ static int apple_smc_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > struct apple_smc *smc; > - u32 count; > + __be32 count; > int ret; > > smc = devm_kzalloc(dev, sizeof(*smc), GFP_KERNEL); > @@ -461,8 +461,10 @@ static int apple_smc_probe(struct platform_device *pdev) > dev_set_drvdata(&pdev->dev, smc); > BLOCKING_INIT_NOTIFIER_HEAD(&smc->event_handlers); > > - ret = apple_smc_read_u32(smc, SMC_KEY(#KEY), &count); > - if (ret) > + ret = apple_smc_read(smc, SMC_KEY(#KEY), &count, sizeof(count)); > + if (ret >= 0 && ret != sizeof(count)) > + ret = -EINVAL; > + if (ret < 0) > return dev_err_probe(smc->dev, ret, "Failed to get key count"); > smc->key_count = be32_to_cpu(count); > > Reviewed-by: Janne Grunau