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From: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	rafael.j.wysocki@intel.com, len.brown@intel.com,
	artem.bityutskiy@linux.intel.com, dave.hansen@linux.intel.com,
	patryk.wlazlyn@linux.intel.com, peterz@infradead.org,
	tglx@linutronix.de, gautham.shenoy@amd.com
Subject: [RFC PATCH v4 3/8] ACPI: processor_idle: Use acpi_idle_play_dead() for all C-states
Date: Mon, 25 Nov 2024 14:20:23 +0100	[thread overview]
Message-ID: <20241125132029.7241-4-patryk.wlazlyn@linux.intel.com> (raw)
In-Reply-To: <20241125132029.7241-1-patryk.wlazlyn@linux.intel.com>

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

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 <peterz@infradead.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Mario Limonciello <mario.limonciello@amd.com> # 6.12-rc7
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 drivers/acpi/processor_idle.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ce728cf7e301..698897b29de2 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -800,12 +800,12 @@ static int acpi_processor_setup_cstates(struct acpi_processor *pr)
 		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
-- 
2.47.0


  parent reply	other threads:[~2024-11-25 13:20 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-25 13:20 [RFC PATCH v4 0/8] SRF: Fix offline CPU preventing pc6 entry Patryk Wlazlyn
2024-11-25 13:20 ` [RFC PATCH v4 1/8] cpuidle: Do not return from cpuidle_play_dead() on callback failures Patryk Wlazlyn
2024-11-25 13:26   ` Rafael J. Wysocki
2024-11-25 14:36     ` Patryk Wlazlyn
2024-11-25 13:20 ` [RFC PATCH v4 2/8] cpuidle: Change :enter_dead() driver callback return type to void Patryk Wlazlyn
2024-11-25 13:20 ` Patryk Wlazlyn [this message]
2024-11-25 13:24   ` [RFC PATCH v4 3/8] ACPI: processor_idle: Use acpi_idle_play_dead() for all C-states Rafael J. Wysocki
2024-11-25 14:39     ` Patryk Wlazlyn
2024-11-25 14:36   ` Gautham R. Shenoy
2024-11-25 13:20 ` [RFC PATCH v4 4/8] x86/smp: Allow calling mwait_play_dead with arbitrary hint Patryk Wlazlyn
2024-11-25 14:39   ` Rafael J. Wysocki
2024-11-26 11:36     ` Patryk Wlazlyn
2024-11-26 11:45       ` Rafael J. Wysocki
2024-11-25 13:20 ` [RFC PATCH v4 5/8] x86/smp native_play_dead: Prefer cpuidle_play_dead() over mwait_play_dead() Patryk Wlazlyn
2024-11-25 13:45   ` Peter Zijlstra
2024-11-25 13:56   ` Rafael J. Wysocki
2024-11-25 14:43     ` Patryk Wlazlyn
2024-11-25 14:48       ` Rafael J. Wysocki
2024-11-26 11:56         ` Patryk Wlazlyn
2024-11-26 12:04           ` Rafael J. Wysocki
2024-11-26 13:10             ` Patryk Wlazlyn
2024-11-26 13:38               ` Rafael J. Wysocki
2024-11-25 13:20 ` [RFC PATCH v4 6/8] intel_idle: Provide enter_dead() handler for SRF Patryk Wlazlyn
2024-11-25 13:44   ` Rafael J. Wysocki
2024-11-25 14:48     ` Patryk Wlazlyn
2024-11-25 14:50       ` Rafael J. Wysocki
2024-11-25 13:53   ` Peter Zijlstra
2024-11-25 13:58     ` Rafael J. Wysocki
2024-11-25 14:12       ` Peter Zijlstra
2024-11-25 14:19         ` Rafael J. Wysocki
2024-11-25 13:20 ` [RFC PATCH v4 7/8] acpi_idle: Add FFH cstate handling Patryk Wlazlyn
2024-11-25 13:41   ` Rafael J. Wysocki
2024-11-25 14:00     ` Rafael J. Wysocki
2024-11-25 15:14   ` Gautham R. Shenoy
2024-11-26 12:03     ` Patryk Wlazlyn
2024-11-25 13:20 ` [RFC PATCH v4 8/8] acpi_idle: Disallow play_dead with FFH cstate on AMD platforms Patryk Wlazlyn
2024-11-25 13:46   ` Rafael J. Wysocki
2024-11-25 13:54   ` Peter Zijlstra
2024-11-25 14:56     ` Patryk Wlazlyn
2024-11-25 15:17       ` Gautham R. Shenoy
2024-11-25 15:15   ` Gautham R. Shenoy
2024-11-26 12:05     ` Patryk Wlazlyn

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