Received: by 2002:a05:6a10:2785:0:0:0:0 with SMTP id ia5csp2332368pxb; Mon, 11 Jan 2021 07:07:13 -0800 (PST) X-Google-Smtp-Source: ABdhPJw3Oy7dbS1oefRKsuck7PMtm/p2AOoDclCer7FIFWx4Gp0cDrNGf5gz7qIWfCQukj2acBCe X-Received: by 2002:a50:fc0d:: with SMTP id i13mr14108316edr.171.1610377632874; Mon, 11 Jan 2021 07:07:12 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1610377632; cv=none; d=google.com; s=arc-20160816; b=K/QFIXCq+ZTF+9DPdn7oHUc3pIs1ABaEN8B7aaXpr5dJB2Fx8MrIVMDeRRa1+O/5d/ E4SFyQCkev6XTvypI314WlbC00v8V80ZTXb8QBRCWApTBL1/iBDx4UFyjKm2Dh0y+Bv1 OHLzUtmpUQuMV/s2+fb8IMRwNdN2WfwCpvZc7FNDtM34BDGetsKKlMpt0/09jGmt2bLq sDTcTIAuJ8u47ZUTQ1rVDHgW2fOzmfZ9ipT3EdMQmTUtHX2yimNN+SN7OV52MgFe19MN MhnsFM99XvIoij7iZIHVe6RADu+0AoLKcyq0vqmPReB/F+9YNnlI9hZnUBePwlqobQph hxWA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:content-language :in-reply-to:mime-version:user-agent:date:message-id:organization :from:references:cc:to:subject; bh=YBVgcHUaq9IPBRt0qO6wRp2JmTHDCedUDtu7H+aBf7I=; b=wROQKLcdPEME8CkgeqSvZ6cTJX3wLiCTfvf123FcCrH5jJnGAZdIU4nTILEuiaxMgO gtMQwstps4hKVvK2nUymLTqGITBoZUyFMr0V2FR7uzZZAqVAblwfynC3u+BJC0uae33P lzUSdiM93MJXtdzU/mNFgjqPUvU/iMis3RsjXZffkYY7nW16+IcPbUMGlA5C1W40k9M+ oW6siZH+DCaswMzX/RuRHoCD9G2m9CDJ4EpM4q773eJnpSxoKral1aE9bvGJfnkgYbu3 GM5XGLRY9+1fknWk+ICWiXB/TOkX5FbEJJXyljyzP0DKez0eYZMV+FKxr5Heq5f0uB8c XNtw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id e22si29307edu.9.2021.01.11.07.06.24; Mon, 11 Jan 2021 07:07:12 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728625AbhAKPFd (ORCPT + 99 others); Mon, 11 Jan 2021 10:05:33 -0500 Received: from imap2.colo.codethink.co.uk ([78.40.148.184]:43418 "EHLO imap2.colo.codethink.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726459AbhAKPFd (ORCPT ); Mon, 11 Jan 2021 10:05:33 -0500 Received: from cpc79921-stkp12-2-0-cust288.10-2.cable.virginm.net ([86.16.139.33] helo=[192.168.0.18]) by imap2.colo.codethink.co.uk with esmtpsa (Exim 4.92 #3 (Debian)) id 1kyykV-0008FJ-EB; Mon, 11 Jan 2021 15:04:51 +0000 Subject: Re: [PATCH] i2c: tegra-bpmp: ignore DMA safe buffer flag To: Mikko Perttunen , thierry.reding@gmail.com, jonathanh@nvidia.com Cc: talho@nvidia.com, linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Muhammed Fazal , stable@vger.kernel.org References: <20210111142713.3641208-1-mperttunen@nvidia.com> From: Ben Dooks Organization: Codethink Limited. Message-ID: <16a0be21-2cbe-dd0e-aed7-b84f6abcacac@codethink.co.uk> Date: Mon, 11 Jan 2021 15:04:50 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20210111142713.3641208-1-mperttunen@nvidia.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/01/2021 14:27, Mikko Perttunen wrote: > From: Muhammed Fazal > > Ignore I2C_M_DMA_SAFE flag as it does not make a difference > for bpmp-i2c, but causes -EINVAL to be returned for valid > transactions. > > Signed-off-by: Muhammed Fazal > Cc: stable@vger.kernel.org # v4.19+ > Signed-off-by: Mikko Perttunen > --- > This fixes failures seen with PMIC probing tools on > Tegra186+ boards. > > drivers/i2c/busses/i2c-tegra-bpmp.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/i2c/busses/i2c-tegra-bpmp.c b/drivers/i2c/busses/i2c-tegra-bpmp.c > index ec7a7e917edd..998d4b21fb59 100644 > --- a/drivers/i2c/busses/i2c-tegra-bpmp.c > +++ b/drivers/i2c/busses/i2c-tegra-bpmp.c > @@ -80,6 +80,9 @@ static int tegra_bpmp_xlate_flags(u16 flags, u16 *out) > flags &= ~I2C_M_RECV_LEN; > } > > + if (flags & I2C_M_DMA_SAFE) > + flags &= ~I2C_M_DMA_SAFE; > + Just a comment, you can do without the test here. Just doing this would have been fine: flags &= ~I2C_M_DMA_SAFE; -- Ben Dooks http://www.codethink.co.uk/ Senior Engineer Codethink - Providing Genius https://www.codethink.co.uk/privacy.html