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Wed, 12 May 2021 14:44:06 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 210E810002A; Wed, 12 May 2021 14:44:06 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id DD70E221F7D; Wed, 12 May 2021 14:44:05 +0200 (CEST) Received: from lmecxl0912.lme.st.com (10.75.127.51) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 12 May 2021 14:44:04 +0200 Subject: Re: [v5.4 stable] arm: stm32: Regression observed on "no-map" reserved memory region To: Quentin Perret CC: Florian Fainelli , Ard Biesheuvel , Rob Herring , Greg Kroah-Hartman , Sasha Levin , stable , Arnd Bergmann , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "linux-kernel@vger.kernel.org" , Nicolas Boichat , Stephen Boyd , KarimAllah Ahmed , Android Kernel Team , Architecture Mailman List , Frank Rowand , linux-arm-kernel References: <001f8550-b625-17d2-85a6-98a483557c70@foss.st.com> From: Alexandre TORGUE Message-ID: <2f384c1f-e897-e458-4562-8a7c0bd338e1@foss.st.com> Date: Wed, 12 May 2021 14:44:04 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG2NODE1.st.com (10.75.127.4) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-05-12_06:2021-05-12, 2021-05-12 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210512_054417_520098_F615182E X-CRM114-Status: GOOD ( 18.67 ) 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: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/12/21 2:34 PM, Quentin Perret wrote: > On Wednesday 12 May 2021 at 12:55:53 (+0200), Alexandre TORGUE wrote: >> We saw that patches [1] and [2] cause issue on stable version (at least for >> 5.4). As you said issue can be seen with above device tree and check in >> /proc/iomem than gpu_reserved region is taken by the kernel as "System RAM". >> >> On v5.10 stream there are no issues seen taking patches [1]&[2] and the >> reason is linked to patches [3]&[4] which have been introduced in v5.10.0. >> Reverting them give me the same behavior than on stable version. > > Thanks for confirming. Given that the patches were not really fixes, I > think reverting is still the best option. I've sent reverts to -stable > for 5.4 and prior: > > https://lore.kernel.org/stable/20210512122853.3243417-1-qperret@google.com/ > Thanks Quentin. alex > Cheers, > Quentin > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel