[PATCH v2 4/4] libata: acpi: set can_power_off for both ODD and HDD
From: Aaron Lu <hidden>
Date: 2012-09-18 07:01:05
Also in:
linux-scsi
Subsystem:
libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Damien Le Moal, Niklas Cassel, Linus Torvalds
Hard disk may also be runtime powered off, so set can_power_off flag for it too if condition satisfies so that the may_power_off sysfs file will be created for it to give user a chance to disable runtime power off. Signed-off-by: Aaron Lu <redacted> Acked-by: Jeff Garzik <redacted> --- drivers/ata/libata-acpi.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-)
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 24347e0..443c3f2 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c@@ -1015,7 +1015,7 @@ static void ata_acpi_add_pm_notifier(struct ata_device *dev) if (ACPI_FAILURE(status)) return; - if (dev->sdev->can_power_off) { + if (dev->class == ATA_DEV_ATAPI && dev->sdev->can_power_off) { acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, ata_acpi_wake_dev, dev); device_set_run_wake(&dev->sdev->sdev_gendev, true);
@@ -1036,7 +1036,7 @@ static void ata_acpi_remove_pm_notifier(struct ata_device *dev) if (ACPI_FAILURE(status)) return; - if (dev->sdev->can_power_off) { + if (dev->class == ATA_DEV_ATAPI && dev->sdev->can_power_off) { device_set_run_wake(&dev->sdev->sdev_gendev, false); acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, ata_acpi_wake_dev);
@@ -1140,14 +1140,23 @@ static int ata_acpi_bind_device(struct ata_port *ap, struct scsi_device *sdev, /* * If firmware has _PS3 or _PR3 for this device, - * and this ata ODD device support device attention, - * it means this device can be powered off + * it means this device can be powered off runtime */ states = acpi_dev->power.states; - if ((states[ACPI_STATE_D3_HOT].flags.valid || - states[ACPI_STATE_D3_COLD].flags.explicit_set) && - ata_dev->flags & ATA_DFLAG_DA) - sdev->can_power_off = 1; + if (states[ACPI_STATE_D3_HOT].flags.valid || + states[ACPI_STATE_D3_COLD].flags.explicit_set) { + /* + * For ODD, it needs to support device attention or + * it can't be powered up back by user + */ + if (ata_dev->class == ATA_DEV_ATAPI && + ata_dev->flags & ATA_DFLAG_DA) + sdev->can_power_off = 1; + + /* No requirement for hard disk */ + if (ata_dev->class == ATA_DEV_ATA) + sdev->can_power_off = 1; + } return 0; }
--
1.7.12.21.g871e293