From nobody Sat Nov 23 01:55:57 2024 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) (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 8A6DE17F505; Thu, 14 Nov 2024 17:46:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=79.96.170.134 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731606386; cv=none; b=rD99V6h7TITY2eA5QRSvGvijcZ+QkSip039HbX2lZJq3KAOobZVXYaqGD6exOZswnfQEzujYYE4uTffgQsHRvV9PEdo5l17xPH3fJvg5jy24aqzyRBoH2nURGU4f+wJP13W3kkY0KvH7EDqfHnRDTdpVQ30/tHLWBGmigF7Sj9I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731606386; c=relaxed/simple; bh=Y5+ODZLSVNT2u3UvSdd3lyMAo2vfTcuSQ7RKhFiXcDA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Pj1U9LsqfvE/k4Ai3YRbdg43I08meFkVjdXg8tDe2PjYylx1lUVQyNd9qC+iCGck0r/xjsjxS/RY2XZ808iN7X9vjjtb4TI/yf1XcySkERhmrtwX68y2R000lX07Q0ehAS1Dwm5jZvxdBi2sxEs4ILWx8xPiPu0zb0zsk6LuYR8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net; spf=pass smtp.mailfrom=rjwysocki.net; dkim=fail (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b=PvUs/B8V reason="signature verification failed"; arc=none smtp.client-ip=79.96.170.134 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rjwysocki.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rjwysocki.net Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=rjwysocki.net header.i=@rjwysocki.net header.b="PvUs/B8V" Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 6.2.1) id 4946fef8b595fdd4; Thu, 14 Nov 2024 18:46:21 +0100 Received: from kreacher.localnet (unknown [195.136.19.94]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by cloudserver094114.home.pl (Postfix) with ESMTPSA id DBFCC665CF6; Thu, 14 Nov 2024 18:46:20 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rjwysocki.net; s=dkim; t=1731606381; bh=Y5+ODZLSVNT2u3UvSdd3lyMAo2vfTcuSQ7RKhFiXcDA=; h=From:Subject:Date; b=PvUs/B8VR66kqq9A3i6o3aKUhdfZsSszLum6AP2tkkNXpY8mW5s8cnMEkeqJMJWtq VUrFVaXfI1v+YNyTE+xQsFHSGP+PMjZtu/VLa4XImkc2HDqwFx0elep9RAZmlNZCvl isWCgyLmB/diUzS6gYYEmdYxqLuhIAj0gi3GwZlN/ygDns2BS5Vc7N/G2t0Lu43aFX qe+6vQ/pLmy55MytK8ZQiZk8XuEeLNFnzrKFOlKmp/+V2Dmi6ffu6jEjvxUPOaRuDG 7k52ArXjY+DGCjRYKyAY04Hxy78TTeI7Ji2gknx23yY6kGWO2a6AMZnxEY97BgIpU6 au8lBrrcLMtrA== From: "Rafael J. Wysocki" To: Linux PM Cc: LKML , x86 Maintainers , Peter Zijlstra , Patryk Wlazlyn , "Gautham R. Shenoy" , Artem Bityutskiy , Mario Limonciello Subject: [PATCH v1] cpuidle: Do not return from cpuidle_play_dead() on callback failures Date: Thu, 14 Nov 2024 18:46:20 +0100 Message-ID: <4992010.31r3eYUQgx@rjwysocki.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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 Content-Type: text/plain; charset="utf-8" From: Rafael J. Wysocki If the :enter_dead() idle state callback fails for a certain state, there may be still a shallower state for which it will work. Because the only caller of cpuidle_play_dead(), native_play_dead(), falls back to hlt_play_dead() if it returns an error, it should better try all of the idle states for which :enter_dead() is present before failing, so change it accordingly. Signed-off-by: Rafael J. Wysocki Reviewed-by: Mario Limonciello Tested-by: Mario Limonciello # 6.12-rc7 --- drivers/cpuidle/cpuidle.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) Index: linux-pm/drivers/cpuidle/cpuidle.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-pm.orig/drivers/cpuidle/cpuidle.c +++ linux-pm/drivers/cpuidle/cpuidle.c @@ -70,9 +70,10 @@ int cpuidle_play_dead(void) return -ENODEV; =20 /* Find lowest-power state that supports long-term idle */ - for (i =3D drv->state_count - 1; i >=3D 0; i--) - if (drv->states[i].enter_dead) - return drv->states[i].enter_dead(dev, i); + for (i =3D drv->state_count - 1; i >=3D 0; i--) { + if (drv->states[i].enter_dead && !drv->states[i].enter_dead(dev, i)) + return 0; + } =20 return -ENODEV; }