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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Chevallier , Lukas Wunner , "Rafael J. Wysocki" , Wei Fang , Niklas =?utf-8?q?S=C3=B6derlund?= , Paul Barker , Florian Fainelli , Doug Berger , Thangaraj Samynathan , Shenwei Wang , Haoning Cheng , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net v5 0/4] net: phy: postpone PHY interrupts during sleep with MAC-managed PM In-Reply-To: <179444109487.2168702.10631162542543162252@kernel.org> References: <20261111-b4-phylib-mac-pm-irq-v3-v5-0-bbfdb5afb7d3@iav.lv> <179444109487.2168702.10631162542543162252@kernel.org> Message-ID: <20261112-phylib-v5-sinfo-reply-1@iav.lv> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit > - Whether the issue was actually triggered, or is only theoretical Patch 4 fixes a hang seen on Helios64 (dwmac-rk, RTL8211F): in s2idle without WoL the board hung or reset 10 of 10 times without the series. The PHY IRQ thread stalls its CPU on an MDIO read while the GMAC clocks are off, so that CPU never answers the NMI: watchdog: CPU0: Watchdog detected hard LOCKUP on cpu 1 After 10 seconds, these CPUS still haven't responded to the NMI: 1 Patches 1-3 fix defects found by code inspection and Sashiko review; they were not triggered.