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Wysocki" To: Linux PM Cc: Daniel Lezcano , LKML , Lukasz Luba , Srinivas Pandruvada , Zhang Rui Subject: [PATCH v1 0/2] thermal: core: Fix two issues related to thermal zone resume Date: Fri, 14 Jun 2024 17:17:35 +0200 Message-ID: <6070114.lOV4Wx5bFT@kreacher> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CLIENT-IP: 195.136.19.94 X-CLIENT-HOSTNAME: 195.136.19.94 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvledrfeduledgkeeiucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepffffffekgfehheffleetieevfeefvefhleetjedvvdeijeejledvieehueevueffnecukfhppeduleehrddufeeirdduledrleegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepudelhedrudefiedrudelrdelgedphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepiedprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopegurghnihgvlhdrlhgviigtrghnoheslhhinhgrrhhordhorhhgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhukhgrshiirdhluhgsrgesrghrmhdrtghomhdprhgtphhtthhopehsrhhinhhivhgrshdrphgrnhgurhhuvhgruggrsehlihhnuhigrdhinhhtvghlrdgtohhmpdhrtghpthhtoheprhhuihdriihhrghnghesihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=6 Fuz1=6 Fuz2=6 Hi Everyone, There are two issues resulting from asynchronous suspend of thermal zones. One of them is platform-specific and related to some firmware issue (I think) causing battery readings to become invalid after a system resume due to interference between ACPI battery resume and a thermal zone update. This can be addressed by running the thermal PM notifier after all of the other PM notifiers (including the ACPI battery one) which is done by patch [2/2]. The other one is mostly theoretical, but I couldn't convince myself that it cannot happen. Namely, a leftover thermal zone resume running during the next system suspend (if it is carried out back-to-back with the previous suspend-resume cycle) can accidentally reset tz->suspended set for a thermal zone by the thermal pre-suspend PM notifier. This is addressed by patch [1/2] (which goes before the second one because the latter increases the likelihood of the issue slightly). Thanks!