From nobody Mon Feb 9 14:15:37 2026 Received: from mout02.posteo.de (mout02.posteo.de [185.67.36.66]) (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 81981320CAC for ; Mon, 27 Oct 2025 20:23:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.67.36.66 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761596635; cv=none; b=EqEeJA9GoFrV+FDk/Bz7VR9LFcbw01tqPtgKQj9yMM9yiOmwC5w5PHdIlw/R4+VdO7wMQbcgBK8a9RUvETXukKvawzhPhVW1qsOZ7J+IRuTmtYPWCqRKaUDomSnQBfneOSdaIBZ3ap7SZi4Dphm+0h1QaNMD5lqkRTVth4BllYs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761596635; c=relaxed/simple; bh=ptGwpd+WzIqccIOIbCCmVciFaDLFlS8NnGcf1Zo9SyQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pHl5LEIcvBAsxb7RS8kIaUOu/OyCHajW2/0qMGsaqeSXG8PymZXtVGiS02iPZ+qx+2ybDEMkRuD2Ip4ahrfGALC7XdyHAQD/lTywFjrWHqa64sU7K7YWMxhqCWqLVxpdhZZU5IOJUEPOy3gwLyE5VfS+pI1jxUJ7KdkgaGg6IN0= 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=c6o7hZR4; arc=none smtp.client-ip=185.67.36.66 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="c6o7hZR4" Received: from submission (posteo.de [185.67.36.169]) by mout02.posteo.de (Postfix) with ESMTPS id 35FD9240107 for ; Mon, 27 Oct 2025 21:23:48 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017; t=1761596628; bh=0vNZm/MLeD0KHdfjj4IScMaJfeMKUSeReXmJhjR9x28=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version: Content-Transfer-Encoding:Autocrypt:OpenPGP:From; b=c6o7hZR4rqziBkqRcBQBj302DVTmDazcq/W399xNpwHhkH3q54ZHW/PjiNr8oVv2M TDJDVPRWX+J35fnCoqquLWSCZUyTgHFg2vWQhjMt0RkJUHF3Jof75hskpYd92HVMTR A8PwAsVGjbN3lMwpZL1dbO4Yy288BDNFFBLSPxrs+BY4CxTh40qdOknnxyKv3CX5u4 p+ThNgNvVOEsaU7POV6fHeGfHCJMuVu7pdtpebfFIE1i/L1O8WHWJqn8NEcpwN9UlC 3ep+InXbwp5HndnKw1kEO5CWoQRCzOPhZWz61QUpRC8MLyFPCQlXzW5bmR1ctmOFHy YB9ip2aEQIaNQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 4cwQ2C1VWrz9rxK; Mon, 27 Oct 2025 21:23:47 +0100 (CET) From: Markus Probst To: Damien Le Moal , Niklas Cassel , "James E.J. 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Petersen" Cc: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Markus Probst Subject: [PATCH v5 2/3] ata: stop disk on restart if ACPI power resources are found Date: Mon, 27 Oct 2025 20:23:47 +0000 Message-ID: <20251027202339.1043723-3-markus.probst@posteo.de> In-Reply-To: <20251027202339.1043723-1-markus.probst@posteo.de> References: <20251027202339.1043723-1-markus.probst@posteo.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3539; i=markus.probst@posteo.de; h=from:subject; bh=ptGwpd+WzIqccIOIbCCmVciFaDLFlS8NnGcf1Zo9SyQ=; b=owEBbQKS/ZANAwAIATR2H/jnrUPSAcsmYgBo/9RcIE/3uX8nBW0BFwxS5bHP3XcqcNjEnIKd8 NPRpM1zBzaJAjMEAAEIAB0WIQSCdBjE9KxY53IwxHM0dh/4561D0gUCaP/UXAAKCRA0dh/4561D 0ostEACPluHdcqT/IOXIf8WLr5pgKfVzODtQprU8bwpU5TasP1Zg5zf5kM6z0+suv2Sz1XBvmi4 SL8lgAPMYaeuIpvxdHYu3upXry+jE3LnWrc7vGBnJNQilSAqeEodWmYTIthQSTIJppgILB4oHai 4AwapNFfEgQUUPnUcpANBkbDZU5Lr7yp8dll1/XB7D6aUmw9J03GKTp1DXL7ZhtXRbxEXckowAH xlbLltJFF8Fs8tM8S2So0wlSYaNVw2bAAdCARwp7phwWNo/+d0v37dR9lLw5ZUcoXxYOoznZ58m rGBCpSBq58xDgtYNw//UV6Sbo8RVjAWmtT82diSY+gcCGgMVMMVL7Q9119nZXlI0gN0dXGaJUtG mcq+/6WjBl1XL9WW+lL9s3VPtKldi+1egMokMsXc+sGttGOZ1uWF/bwsjQuBFw9jaDGPahOz1Qp zLSI0TzYdlNerK8XCF4UNKmcl51YnVHMcS3hokEIz3FUZ1vzu/obLCUXvTyao3V10DAS2sWl3oX Yw+LPIDcyLcO8LK3Ro8I+oHW7sK632zcLthrz4Hp028OczXQ4iuRq6t1hqoT8RhNVOBOr+Dhics ogOXWeIXatv6sjPeDXtuCa8GeE/PgWAqGPp6cOX2SgiRmx/BycO/zE6r/uMwdevr1p+DNn7lH8E BM7nMVFfljargCg= = X-Developer-Key: i=markus.probst@posteo.de; 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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 Reviewed-by: Damien Le Moal --- drivers/ata/libata-acpi.c | 26 ++++++++++++++++++++++++++ drivers/ata/libata-scsi.c | 1 + drivers/ata/libata.h | 2 ++ 3 files changed, 29 insertions(+) diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index f2140fc06ba0..196ca1227d09 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -245,6 +245,32 @@ 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: + * true if the disk should be stopped, otherwise false. + */ +bool ata_acpi_dev_manage_restart(struct ata_device *dev) +{ + struct device *tdev; + + /* + * 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) + tdev =3D &dev->tdev; + else + tdev =3D &dev->link->ap->tdev; + + if (!is_acpi_device_node(tdev->fwnode)) + return false; + return acpi_bus_power_manageable(ACPI_HANDLE(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