From nobody Mon Feb 9 00:55:01 2026 Received: from mout01.posteo.de (mout01.posteo.de [185.67.36.65]) (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 4C2FD3431F2 for ; Thu, 23 Oct 2025 16:52:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.65 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761238341; cv=none; b=ER+zbPKs8tVEoH+d4HjAavD6tFxQ6A9cm+isbrYf/ZK3qiRHGZdAwW3WS+juxQFWaSaLDJZrNdCyRx5WSCq1Y2MY4ldmKhr7NjObq20TdMQM8aqhVuTJtcQKjxLfISvthRmZHZV76G6Lodse6fPFXNu/bGQkmi6I9WbeUSPsPGk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761238341; c=relaxed/simple; bh=tSX3vYTE+nLU4gQ4m/vBATvsG+7opQE791pNyEYrMyc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iiYvQWg58kbtTPQJB8Qyxb2Gbx2wggHqRksEun/Jt+/q8AIKgys+nWxrwG1Z/v+cIuREe1Qwi8bhpf1DDdvZEHAMHPeKcgdxfYEMCzqcGfZpPgU0UzT1SsTyPwGvGCYBz5zlZlY6BtyzuHH11jrznvWz54v1uW/VNBbsJ3JuKXQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de; spf=pass smtp.mailfrom=posteo.de; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b=nexwmLVo; arc=none smtp.client-ip=185.67.36.65 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=posteo.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=posteo.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=posteo.de header.i=@posteo.de header.b="nexwmLVo" Received: from submission (posteo.de [185.67.36.169]) by mout01.posteo.de (Postfix) with ESMTPS id 9A0CE240029 for ; Thu, 23 Oct 2025 18:52:12 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1761238332; bh=eB113gEk+eEgeStmSFaPXQpKCZosS1cHz4G4+IMq5ZU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version: Content-Transfer-Encoding:Autocrypt:OpenPGP:From; b=nexwmLVoRrmVRKa2oamf9oHfP4BY9aOLDISjeuiqRZss1u4GTSKoZFIf1YjD9JpCM R0a2XYj8AHSDHm6CklqA/Qll0oZiNbIOavKDy/+seQE1nk6An2rePt+lhQJpzjbbO/ XGBP9vVO65pd9SK4RPA2RK3LwtW9HwfweJPCiAQw+wzlfuPwRYXNvoB5wuhZRFLnhN LG7eWtAPTUhi0IP70wLmuduZI653zxmX6XiINOEYO/OJIv0CV59pVxbyk5djGhNz4F UdgWqoTjVJvYQDxHXJhoEI2lwD+iO3SUpsyiOBQLooay+J+rHJ2c96XpczV97+j5lA KIdml4b7jZodg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4cssWv3Yfgz9rxM; Thu, 23 Oct 2025 18:52:11 +0200 (CEST) From: Markus Probst To: Damien Le Moal , Niklas Cassel , "James E.J. Bottomley" , "Martin K. Petersen" Cc: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Markus Probst Subject: [PATCH v4 2/3] ata: stop disk on restart if ACPI power resources are found Date: Thu, 23 Oct 2025 16:52:12 +0000 Message-ID: <20251023165151.722252-3-markus.probst@posteo.de> In-Reply-To: <20251023165151.722252-1-markus.probst@posteo.de> References: <20251023165151.722252-1-markus.probst@posteo.de> 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 Autocrypt: addr=markus.probst@posteo.de; prefer-encrypt=mutual; keydata=xsFNBGiDvXgBEADAXUceKafpl46S35UmDh2wRvvx+UfZbcTjeQOlSwKP7YVJ4JOZrVs93qReNLkO WguIqPBxR9blQ4nyYrqSCV+MMw/3ifyXIm6Pw2YRUDg+WTEOjTixRCoWDgUj1nOsvJ9tVAm76Ww+ /pAnepVRafMID0rqEfD9oGv1YrfpeFJhyE2zUw3SyyNLIKWD6QeLRhKQRbSnsXhGLFBXCqt9k5JA RhgQof9zvztcCVlT5KVvuyfC4H+HzeGmu9201BVyihJwKdcKPq+n/aY5FUVxNTgtI9f8wIbmfAja oT1pjXSp+dszakA98fhONM98pOq723o/1ZGMZukyXFfsDGtA3BB79HoopHKujLGWAGskzClwTjRQ xBqxh/U/lL1pc+0xPWikTNCmtziCOvv0KA0arDOMQlyFvImzX6oGVgE4ksKQYbMZ3Ikw6L1Rv1J+ FvN0aNwOKgL2ztBRYscUGcQvA0Zo1fGCAn/BLEJvQYShWKeKqjyncVGoXFsz2AcuFKe1pwETSsN6 OZncjy32e4ktgs07cWBfx0v62b8md36jau+B6RVnnodaA8++oXl3FRwiEW8XfXWIjy4umIv93tb8 8ekYsfOfWkTSewZYXGoqe4RtK80ulMHb/dh2FZQIFyRdN4HOmB4FYO5sEYFr9YjHLmDkrUgNodJC XCeMe4BO4iaxUQARAQABzRdtYXJrdXMucHJvYnN0QHBvc3Rlby5kZcLBkQQTAQgAOxYhBIJ0GMT0 rFjncjDEczR2H/jnrUPSBQJog714AhsDBQsJCAcCAiICBhUKCQgLAgQWAgMBAh4HAheAAAoJEDR2 H/jnrUPSgdkQAISaTk2D345ehXEkn5z2yUEjaVjHIE7ziqRaOgn/QanCgeTUinIv6L6QXUFvvIfH 1OLPwQ1hfvEg9NnNLyFezWSy6jvoVBTIPqicD/r3FkithnQ1IDkdSjrarPMxJkvuh3l7XZHo49GV HQ8i5zh5w4YISrcEtE99lJisvni2Jqx7we5tey9voQFDyM8jxlSWv3pmoUTCtBkX/eKHJXosgsuS B4TGDCVPOjla/emI5c9MhMG7O4WEEmoSdPbmraPw66YZD6uLyhV4DPHbiDWRzXWnClHSyjB9rky9 lausFxogvu4l9H+KDsXIadNDWdLdu1/enS/wDd9zh5S78rY2jeXaG4mnf4seEKamZ7KQ6FIHrcyP ezdDzssPQcTQcGRMQzCn6wP3tlGk7rsfmyHMlFqdRoNNv+ZER/OkmZFPW655zRfbMi0vtrqK2Awm 9ggobb1oktfd9PPNXMUY+DNVlgR2G7jLnenSoQausLUm0pHoNE8TWFv851Y6SOYnvn488sP1Tki5 F3rKwclawQFHUXTCQw+QSh9ay8xgnNZfH+u9NY7w3gPoeKBOAFcBc2BtzcgekeWS8qgEmm2/oNFV G0ivPQbRx8FjRKbuF7g3YhgNZZ0ac8FneuUtJ2PkSIFTZhaAiC0utvxk0ndmWFiW4acEkMZGrLaM L2zWNjrqwsD2zsFNBGiDvXgBEADCXQy1n7wjRxG12DOVADawjghKcG+5LtEf31WftHKLFbp/HArj BhkT6mj+CCI1ClqY+FYU5CK/s0ScMfLxRGLZ0Ktzawb78vOgBVFT3yB1yWBTewsAXdqNqRooaUNo 8cG/NNJLjhccH/7PO/FWX5qftOVUJ/AIsAhKQJ18Tc8Ik73v427EDxuKb9mTAnYQFA3Ev3hAiVbO 6Rv39amVOfJ8sqwiSUGidj2Fctg2aB5JbeMln0KCUbTD1LhEFepeKypfofAXQbGwaCjAhmkWy/q3 IT1mUrPxOngbxdRoOx1tGUC0HCMUW1sFaJgQPMmDcR0JGPOpgsKnitsSnN7ShcCr1buel7vLnUMD +TAZ5opdoF6HjAvAnBQaijtK6minkrM0seNXnCg0KkV8xhMNa6zCs1rq4GgjNLJue2EmuyHooHA4 7JMoLVHcxVeuNTp6K2+XRx0Pk4e2Lj8IVy9yEYyrywEOC5XRW37KJjsiOAsumi1rkvM7QREWgUDe Xs0+RpxI3QrrANh71fLMRo7LKRF3Gvw13NVCCC9ea20P4PwhgWKStkwO2NO+YJsAoS1QycMi/vKu 0EHhknYXamaSV50oZzHKmX56vEeJHTcngrM8R1SwJCYopCx9gkz90bTVYlitJa5hloWTYeMD7FNj Y6jfVSzgM/K4gMgUNDW/PPGeMwARAQABwsF2BBgBCAAgFiEEgnQYxPSsWOdyMMRzNHYf+OetQ9IF AmiDvXgCGwwACgkQNHYf+OetQ9LHDBAAhk+ab8+WrbS/b1/gYW3q1KDiXU719nCtfkUVXKidW5Ec Idlr5HGt8ilLoxSWT2Zi368iHCXS0WenGgPwlv8ifvB7TOZiiTDZROZkXjEBmU4nYjJ7GymawpWv oQwjMsPuq6ysbzWtOZ7eILx7cI0FjQeJ/Q2baRJub0uAZNwBOxCkAS6lpk5Fntd2u8CWmDQo4SYp xeuQ+pwkp0yEP30RhN2BO2DXiBEGSZSYh+ioGbCHQPIV3iVj0h6lcCPOqopZqyeCfigeacBI0nvN jHWz/spzF3+4OS+3RJvoHtAQmProxyGib8iVsTxgZO3UUi4TSODeEt0i0kHSPY4sCciOyXfAyYoD DFqhRjOEwBBxhr+scU4C1T2AflozvDwq3VSONjrKJUkhd8+WsdXxMdPFgBQuiKKwUy11mz6KQfcR wmDehF3UaUoxa+YIhWPbKmycxuX/D8SvnqavzAeAL1OcRbEI/HsoroVlEFbBRNBZLJUlnTPs8ZcU 4+8rq5YX1GUrJL3jf6SAfSgO7UdkEET3PdcKFYtS+ruV1Cp5V0q4kCfI5jk25iiz8grM2wOzVSsc l1mEkhiEPH87HP0whhb544iioSnumd3HJKL7dzhRegsMizatupp8D65A2JziW0WKopa1iw9fti3A aBeNN4ijKZchBXHPgVx+YtWRHfcm4l8= OpenPGP: url=https://posteo.de/keys/markus.probst@posteo.de.asc; preference=encrypt Content-Type: text/plain; charset="utf-8" Some embedded devices have the ability to control whether power is provided to the disks via the SATA power connector or not. ACPI power resources are usually off by default, thus making it unclear if the specific power resource will retain its state after a restart. If power resources are defined on ATA ports / devices in ACPI, we should stop the disk on SYSTEM_RESTART, to ensure the disk will not lose power while active. Add a new function, ata_acpi_dev_manage_restart(), that will be used to determine if a disk should be stopped before restarting the system. If a usable ACPI power resource has been found, it is assumed that the disk will lose power after a restart and should be stopped to avoid a power failure. Signed-off-by: Markus Probst --- drivers/ata/libata-acpi.c | 28 ++++++++++++++++++++++++++++ drivers/ata/libata-scsi.c | 1 + drivers/ata/libata.h | 2 ++ 3 files changed, 31 insertions(+) diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index f2140fc06ba0..f05c247d25bc 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -245,6 +245,34 @@ void ata_acpi_bind_dev(struct ata_device *dev) ata_acpi_dev_uevent); } =20 +/** + * ata_acpi_dev_manage_restart - if the disk should be stopped (spun down)= on + * system restart. + * @dev: target ATA device + * + * RETURNS: + * 1 if the disk should be stopped, otherwise 0 + */ +bool ata_acpi_dev_manage_restart(struct ata_device *dev) +{ + /* If the device is power manageable, we assume the disk loses power on + * reboot. + */ + + /* If `ATA_FLAG_ACPI_SATA` is set, the acpi fwnode is attached to the + * `ata_device` instead of the `ata_port`. + */ + if (dev->link->ap->flags & ATA_FLAG_ACPI_SATA) { + if (!is_acpi_device_node(dev->tdev.fwnode)) + return 0; + return acpi_bus_power_manageable(ACPI_HANDLE(&dev->tdev)); + } + + if (!is_acpi_device_node(dev->link->ap->tdev.fwnode)) + return 0; + return acpi_bus_power_manageable(ACPI_HANDLE(&dev->link->ap->tdev)); +} + /** * ata_acpi_dissociate - dissociate ATA host from ACPI objects * @host: target ATA host diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index b43a3196e2be..026122bb6f2f 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1095,6 +1095,7 @@ int ata_scsi_dev_config(struct scsi_device *sdev, str= uct queue_limits *lim, */ sdev->manage_runtime_start_stop =3D 1; sdev->manage_shutdown =3D 1; + sdev->manage_restart =3D ata_acpi_dev_manage_restart(dev); sdev->force_runtime_start_on_system_start =3D 1; } =20 diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index e5b977a8d3e1..af08bb9b40d0 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -130,6 +130,7 @@ extern void ata_acpi_on_disable(struct ata_device *dev); extern void ata_acpi_set_state(struct ata_port *ap, pm_message_t state); extern void ata_acpi_bind_port(struct ata_port *ap); extern void ata_acpi_bind_dev(struct ata_device *dev); +extern bool ata_acpi_dev_manage_restart(struct ata_device *dev); extern acpi_handle ata_dev_acpi_handle(struct ata_device *dev); #else static inline void ata_acpi_dissociate(struct ata_host *host) { } @@ -140,6 +141,7 @@ static inline void ata_acpi_set_state(struct ata_port *= ap, pm_message_t state) { } static inline void ata_acpi_bind_port(struct ata_port *ap) {} static inline void ata_acpi_bind_dev(struct ata_device *dev) {} +static inline bool ata_acpi_dev_manage_restart(struct ata_device *dev) { r= eturn 0; } #endif =20 /* libata-scsi.c */ --=20 2.51.0