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 X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6AD8DC3A5A5 for ; Thu, 5 Sep 2019 13:37:56 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id CA3C2206DE for ; Thu, 5 Sep 2019 13:37:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="QV+idKld" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CA3C2206DE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=the-dreams.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type:Cc: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject: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=AFEfTPJdEzyD7so0BIrrY0g1xpnYSAOJtkfeD46wugw=; b=QV+idKldZVPdLWJHTC5vzye5p vzQvEZV5pFOyDVmNXGOeRVcMmjBnrmUKkeQvEwAmygKTRpaL0kXgSALIvjMoCUPvRveQRSNqf9Piu c6YKvnVIJG8lk51y0JZWvGqPfFt2Jzwt3t+hH1X5mJ0+cIZN9sfg6+pNT5XDmy2Xn/y+RrB9bDIdr Jpx5r9o4JEnrhT+qacWM4Jd8TbArBjsJFCqY21DTSmiOXdL9mAYBts+2zurSEWRZ8aAC3Zn+Nw95C 2KAuVUj5o28pKRamabimbZ8XbRfItLpn9KH5YhhjttlU9HIoFXnBAX+nlsR4TKczegf+dla8VtsXx OPITNVpsQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i5rxP-0005OS-Js; Thu, 05 Sep 2019 13:37:51 +0000 Received: from sauhun.de ([88.99.104.3] helo=pokefinder.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i5rxM-0005NI-U7 for linux-arm-kernel@lists.infradead.org; Thu, 05 Sep 2019 13:37:50 +0000 Received: from localhost (p54B335F6.dip0.t-ipconnect.de [84.179.53.246]) by pokefinder.org (Postfix) with ESMTPSA id 31A312C00C0; Thu, 5 Sep 2019 15:37:44 +0200 (CEST) Date: Thu, 5 Sep 2019 15:37:43 +0200 From: Wolfram Sang To: Lee Jones Subject: Re: [PATCH 1/2] i2c: qcom-geni: Provide an option to select FIFO processing Message-ID: <20190905133743.GE1157@kunai> References: <20190904113613.14997-1-lee.jones@linaro.org> <20190904203548.GC580@tuxbook-pro> <20190904212337.GF23608@ninjato> <20190905071103.GX26880@dell> <20190905091617.GC1157@kunai> <20190905093444.GE26880@dell> MIME-Version: 1.0 In-Reply-To: <20190905093444.GE26880@dell> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190905_063749_117582_78CF776C X-CRM114-Status: GOOD ( 13.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, agross@kernel.org, robh+dt@kernel.org, Bjorn Andersson , alokc@codeaurora.org, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============6472864147567913146==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============6472864147567913146== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="gMR3gsNFwZpnI/Ts" Content-Disposition: inline --gMR3gsNFwZpnI/Ts Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > > So, are there investigations running why this reboot happens? >=20 > Yes, but they have been running for months, literally. I see. This is good to know. Just so I also know where we are with this. > > Which is a clear disadvantage of that solution. It won't fix older > > kernels. My suggestion above should fix them, too. >=20 > Not sure how this is possible. Unless you mean LTS? Why not? Using of_machine_is_compatible() makes the patch 100% self contained (no extra binding needed). It will work wherever the machine description fits. > > Unless we know why the reboot happens on your platform, I'd be careful > > with saying "work obviously well" on other platforms. >=20 > Someone must have tested it? Surely ... ;) It seems to work mostly, I won't deny that. But we don't know if the buggy situation can be triggered on these platforms as well by something else later. We just don't know. > > My suggestion: > >=20 > > For 5.3, use of_machine_is_compatible() and we backport that. For later, > > try to find out the root cause and fix it. If that can't be done, try to > > set up a generic "disable-dma" property and use it. > >=20 > > What do you think about that? >=20 > Sounds okay to me. Let me code that up. 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