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 <aaron.lu@xxxxxxxxx>
Acked-by: Jeff Garzik <jgarzik@xxxxxxxxxx>
---
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
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
