[v9,10/10] ata: expose pm qos flags to user space for ata device

Submitted by Aaron Lu on Nov. 9, 2012, 6:52 a.m.


Message ID 1352443922-13734-11-git-send-email-aaron.lu@intel.com
State Not Applicable
Delegated to: David Miller
Headers show

Commit Message

Aaron Lu Nov. 9, 2012, 6:52 a.m.
Expose pm qos flags to user space so that user has a chance to disable
pm features like power off, if he/she has a broken platform or devices
or simply does not like this pm feature.

This flag is exposed to user space only for ata device or atapi device
that is zero power capable. For normal atapi device, it will never be
powered off.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
 drivers/ata/libata-acpi.c | 2 ++
 1 file changed, 2 insertions(+)

Patch hide | download patch | download mbox

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 91f3405..3984290 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -1031,6 +1031,8 @@  void ata_acpi_bind(struct ata_device *dev)
 	dev_pm_qos_add_request(&dev->sdev->sdev_gendev, &dev->poweroff_req,
 				DEV_PM_QOS_FLAGS, value);
+	if (dev->class == ATA_DEV_ATA || zpodd_dev_enabled(dev))
+		dev_pm_qos_expose_flags(&dev->sdev->sdev_gendev, 0);
 void ata_acpi_unbind(struct ata_device *dev)