diff options
| author | Markus Probst <markus.probst@posteo.de> | 2025-11-04 14:24:34 +0000 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2025-11-08 13:24:56 -0500 |
| commit | 8c59fc1c90df7ff29565d9743f0e61180e9ee00d (patch) | |
| tree | 35a8a0d0332c76fc433b398da923400df9fbafcc /drivers/ata/libata.h | |
| parent | ce6d26b5330c5de4f458143e9675984e367f6a40 (diff) | |
scsi: ata: Stop disk on restart if ACPI power resources are found
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 unclean
shutdown due to power loss.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Markus Probst <markus.probst@posteo.de>
Link: https://patch.msgid.link/20251104142413.322347-4-markus.probst@posteo.de
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/ata/libata.h')
| -rw-r--r-- | drivers/ata/libata.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 8cc7227f2d94..0e7ecac73680 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -131,6 +131,7 @@ 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 void ata_acpi_port_power_on(struct ata_port *ap); +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) { } @@ -142,6 +143,7 @@ static inline void ata_acpi_set_state(struct ata_port *ap, static inline void ata_acpi_bind_port(struct ata_port *ap) {} static inline void ata_acpi_bind_dev(struct ata_device *dev) {} static inline void ata_acpi_port_power_on(struct ata_port *ap) {} +static inline bool ata_acpi_dev_manage_restart(struct ata_device *dev) { return 0; } #endif /* libata-scsi.c */ |