From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 460B221C9EA; Thu, 9 Jul 2026 12:47:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783601278; cv=none; b=affKJmQhbOihdiSWbNEuUDZKGwKcYclh/W8M424EbKhfadBuBS/JZCmwgJzSe2AuwYusiG93KGUzQCe8wsxYbTlhGEPTTDIzCTT1tYODn58s/yfMKUlr2umF15M09w7QgLd7FYlrchNt8Jap1VTqKGcyc1kthO4sC0Wn3A9Nl24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783601278; c=relaxed/simple; bh=p//xG4dF10nozG9lWw1MVV5myP4qHb65D7dsKdfkAg8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=CT+91TecPHOktcv475OwwSNKi3xhB8EWfz/2fRw4U7lIOxw/pD5VBz/W+I+YX10eO5Gqc53aCf7b9og6zUXPYvmLsQCf31HVmI3epXc/BQCT8h9wbMUn9mWSlLdHxdIuWkjCLUgRjTBEe+GYjAZnMb1QaHE64TG2/B9wxr1fZKo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jKiJ+lPS; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jKiJ+lPS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1AF3A1F000E9; Thu, 9 Jul 2026 12:47:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783601276; bh=+ZkTm+LK83S0+VOfTvR+xKjCkxaP6Wn4EylKTUubACw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=jKiJ+lPSgzp+xYYZVovzkzs3Lp5Szuk1zpuvMMuL2+Z+UEtvT+bmnbRFrzP3HJbcg FLpBi7qBx+iTVh3tCV0JdzYzSqhQQyTB+p2JtPnzjG4BwhMWwKIlpHTHeYtKx202dC 8IY9AH/E31o2U/PpI0rjGrs0stV8SL5AFjsJXSe83D7xPMkziiV+0QRSzKZOBb7HJS 4ulk8jCP7dePwMXCDcP2x0lWDnVyOm6N8EH/Y90PRO2FUriebqZfRGq9cDTglvNhg1 9JX+OZlj84wK5k8SbH/gdbB8J/jj2Oi/t8qXXrY6tY8Qq1OLY+4SxnpQ5hGIbc+3mg XB8tpH3CqC0qg== From: "Rafael J. Wysocki" To: Linux PM Cc: Linux ACPI , Sudeep Holla Subject: [PATCH v1 02/17] ACPI: processor: idle: Ignore _LPI states with SYSTEMIO entry method Date: Thu, 09 Jul 2026 14:31:28 +0200 Message-ID: <2268989.irdbgypaU6@rafael.j.wysocki> Organization: Linux Kernel Development - Intel In-Reply-To: <4746278.LvFx2qVVIh@rafael.j.wysocki> References: <4746278.LvFx2qVVIh@rafael.j.wysocki> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="UTF-8" From: "Rafael J. Wysocki" The only entry method for _LPI states supported by acpi_idle_lpi_enter() is FFH and it is better to ignore _LPI states with the SYSTEMIO entry method upfront than return an error from acpi_idle_lpi_enter() on attempts to use them. Update acpi_processor_evaluate_lpi() accordingly. Signed-off-by: Rafael J. Wysocki --- drivers/acpi/processor_idle.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index d573f201295a..aa6d5d8edc79 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -935,14 +935,15 @@ static int acpi_processor_evaluate_lpi(acpi_handle handle, } reg = (struct acpi_power_register *)obj->buffer.pointer; - if (reg->space_id != ACPI_ADR_SPACE_SYSTEM_IO && - reg->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) + if (reg->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) { + acpi_handle_debug(handle, + "Unsupported entry method for _LPI state %d\n", + state_idx); continue; + } + lpi_state->entry_method = ACPI_CSTATE_FFH; lpi_state->address = reg->address; - lpi_state->entry_method = - reg->space_id == ACPI_ADR_SPACE_FIXED_HARDWARE ? - ACPI_CSTATE_FFH : ACPI_CSTATE_SYSTEMIO; } else if (obj->type == ACPI_TYPE_INTEGER) { lpi_state->entry_method = ACPI_CSTATE_INTEGER; lpi_state->address = obj->integer.value; -- 2.51.0