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Fri, 06 Nov 2026 11:08:30 -0800 (PST) Received: from dev.Default ([86.127.229.203]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b7efb0b0c2sm456055e9.8.2026.11.06.11.08.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 11:08:29 -0800 (PST) From: Agustin Santiago Isasmendi To: Navid Ghahremani Cc: linux-arm-kernel@lists.infradead.org, arnd@arndb.de, stefandoesinger@gmail.com, krzk@kernel.org Subject: Re: [PATCH v2 00/24] ARM: zte: Add support for Sanechips ZX279128S and ZTE ZXHN H3600 Date: Fri, 6 Nov 2026 20:08:28 +0100 Message-Id: <20261106190828.3823287-1-isasmendi.agus@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20261014072109.1759502-1-ghahramani.navid@gmail.com> References: <20261014072109.1759502-1-ghahramani.navid@gmail.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261106_110832_436136_24275FF4 X-CRM114-Status: GOOD ( 10.68 ) X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Hi Navid, One more finding from testing on my H3600, more serious than the others: with this series as posted, the board hangs hard as soon as there is sustained WiFi traffic. Setup: mt7915e built in, hostapd on the 5 GHz radio bridged with lan1, a phone uploading to a host on lan1. The first bulk transfer stalls after a few seconds and the system never comes back: no console, no oops; only a reset recovers it. 3 boots out of 3, always within the first transfer. As far as I can tell from earlier work on this SoC, the cause is an mt76 register read over PCIe that is outstanding while the PL310 performs a cache maintenance operation, which deadlocks the bus. Serializing device reads against PL310 maintenance makes the same test pass on 3 boots out of 3, and a 30 minute mixed WiFi/LAN/WAN soak runs clean. I'm preparing that as an RFC for linux-arm-kernel, since it affects any PCIe device on this SoC, not only your driver. Did you run sustained traffic over WiFi on your unit, and did you see anything similar? Agustin