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Fri, 13 Nov 2026 12:34:28 -0800 (PST) Received: from claudebox.iyengar.cloud ([50.39.139.68]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3b1ae98151dsm5954809a91.2.2026.11.13.12.34.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Nov 2026 12:34:28 -0800 (PST) From: Arun Iyengar To: MyungJoo Ham , Kyungmin Park , Chanwoo Choi Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Boris Brezillon , Steven Price , Liviu Dudau , Jonas Karlman Subject: Re: [PATCH] PM / devfreq: Do not change the frequency of a suspended device In-Reply-To: <20261112-devfreq-suspend-sync-v1-1-af64603ef43e@gmail.com> References: <20261112-devfreq-suspend-sync-v1-1-af64603ef43e@gmail.com> Date: Fri, 13 Nov 2026 20:34:27 -0000 Message-ID: <179460206763.199714.13518791714665074913@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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 Please don't apply this version. The Sashiko review found bugs in it: - A limit change on a suspended passive device stores 0 in pending_freq, so devfreq_resume_device() can then fail with -EINVAL. - After a deferred update, resume asks the governor instead of restoring resume_freq, so a userspace governor without set_freq stays at the suspend OPP. - Two error paths leave the device marked suspended or skip DEVFREQ_GOV_RESUME. - The passive question in the cover: exynos-bus children need to follow their parent to its suspend OPP, also at shutdown. v2 will fix these. Arun