From patchwork Thu Jan 10 09:24:27 2013
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Subject: [v12,6/9] libata: expose pm qos flags for ata device
Date: Wed, 09 Jan 2013 23:24:27 -0000
From: Aaron Lu <aaron.lu@intel.com>
X-Patchwork-Id: 210959
Message-Id: <1357809870-18816-7-git-send-email-aaron.lu@intel.com>
To: Jeff Garzik <jgarzik@pobox.com>,
 James Bottomley <James.Bottomley@hansenpartnership.com>,
 "Rafael J. Wysocki" <rjw@sisk.pl>,
 Alan Stern <stern@rowland.harvard.edu>, Tejun Heo <tj@kernel.org>
Cc: Aaron Lu <aaron.lwe@gmail.com>, Jeff Wu <jeff.wu@amd.com>,
 linux-ide@vger.kernel.org, linux-pm@vger.kernel.org,
 linux-scsi@vger.kernel.org, linux-acpi@vger.kernel.org,
 Aaron Lu <aaron.lu@intel.com>

Expose pm qos flags to user space so that user has a chance to disable
ZPODD feature, if he/she has a broken platform or devices or simply does
not like this feature.

This flag is exposed to user space only for ZPODD devices.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>

---
drivers/ata/libata-acpi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 6f72c64..9709449 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -17,6 +17,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_qos.h>
 #include <scsi/scsi_device.h>
 #include "libata.h"
 
@@ -1022,6 +1023,8 @@ static void ata_acpi_unregister_power_resource(struct ata_device *dev)
 void ata_acpi_bind(struct ata_device *dev)
 {
 	ata_acpi_register_power_resource(dev);
+	if (zpodd_dev_enabled(dev))
+		dev_pm_qos_expose_flags(&dev->sdev->sdev_gendev, 0);
 }
 
 void ata_acpi_unbind(struct ata_device *dev)