Patchwork [v12,6/9] libata: expose pm qos flags for ata device

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Submitter Aaron Lu
Date Jan. 10, 2013, 9:24 a.m.
Message ID <1357809870-18816-7-git-send-email-aaron.lu@intel.com>
Download mbox | patch
Permalink /patch/210959/
State Not Applicable
Delegated to: David Miller
Headers show

Comments

Aaron Lu - Jan. 10, 2013, 9:24 a.m.
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>
---
 drivers/ata/libata-acpi.c | 3 +++
 1 file changed, 3 insertions(+)
Tejun Heo - Jan. 10, 2013, 7:55 p.m.
On Thu, Jan 10, 2013 at 05:24:27PM +0800, Aaron Lu wrote:
> 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>

Thanks.

Patch

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)