From patchwork Thu Nov 14 17:47:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. 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Wysocki" To: Linux PM Cc: LKML , x86 Maintainers , Peter Zijlstra , Patryk Wlazlyn , "Gautham R. Shenoy" , Artem Bityutskiy , Mario Limonciello Subject: [PATCH v1] ACPI: processor_idle: Use acpi_idle_play_dead() for all C-states Date: Thu, 14 Nov 2024 18:47:55 +0100 Message-ID: <2373563.ElGaqSPkdT@rjwysocki.net> 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: gggruggvucftvghtrhhoucdtuddrgeefuddrvddvgddutdegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkfgggfgtsehtufertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepffffffekgfehheffleetieevfeefvefhleetjedvvdeijeejledvieehueevueffnecukfhppeduleehrddufeeirdduledrleegnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepudelhedrudefiedrudelrdelgedphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomheprhhjfiesrhhjfiihshhotghkihdrnhgvthdpnhgspghrtghpthhtohepkedprhgtphhtthhopehlihhnuhigqdhpmhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopeigkeeisehkvghrnhgvlhdrohhrghdprhgtphhtthhopehpvghtvghriiesihhnfhhrrgguvggrugdrohhrghdprhgtphhtthhopehprghtrhihkhdrfihlrgiilhihnheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthh X-DCC--Metrics: v370.home.net.pl 0; Body=8 Fuz1=8 Fuz2=8 From: Rafael J. Wysocki Notice that acpi_processor_setup_cstates() can set state->enter_dead to acpi_idle_play_dead() for all C-states unconditionally and remove the confusing C-state type check done before setting it. No intentional functional impact. Suggested-by: Peter Zijlstra Signed-off-by: Rafael J. Wysocki Acked-by: Peter Zijlstra (Intel) --- drivers/acpi/processor_idle.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) Index: linux-pm/drivers/acpi/processor_idle.c =================================================================== --- linux-pm.orig/drivers/acpi/processor_idle.c +++ linux-pm/drivers/acpi/processor_idle.c @@ -803,12 +803,12 @@ static int acpi_processor_setup_cstates( state->enter = acpi_idle_enter; state->flags = 0; - if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2 || - cx->type == ACPI_STATE_C3) { - state->enter_dead = acpi_idle_play_dead; - if (cx->type != ACPI_STATE_C3) - drv->safe_state_index = count; - } + + state->enter_dead = acpi_idle_play_dead; + + if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2) + drv->safe_state_index = count; + /* * Halt-induced C1 is not good for ->enter_s2idle, because it * re-enables interrupts on exit. Moreover, C1 is generally not