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authorAaron Lu <aaron.lu@intel.com>2013-01-15 17:21:02 +0800
committerJeff Garzik <jgarzik@redhat.com>2013-01-21 15:42:15 -0500
commita59b9aae230316134597775c6202cf28f6da0333 (patch)
tree0982779c88d00690a37fbc0ec8304fd854b1a534 /drivers/ata
parent213342053db58eabdaddff9c036c2b81ca63c443 (diff)
downloadvexpress-lsk-a59b9aae230316134597775c6202cf28f6da0333.tar.gz
libata: expose pm qos flags for ata device
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. Due to this flag, it is possible the ODD is ZP ready but we didn't power it off. So the zp_ready flag will need to be cleared whenever we found the ODD is not in ZP ready state. Previously, once zp_ready is set, the ODD will always be powered off and the flag will be cleared in post_poweron. But this is no longer the case now. Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-acpi.c3
-rw-r--r--drivers/ata/libata-zpodd.c1
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 6f72c648ea1..97094496127 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)
diff --git a/drivers/ata/libata-zpodd.c b/drivers/ata/libata-zpodd.c
index 1f5d52ae397..540b0b7904f 100644
--- a/drivers/ata/libata-zpodd.c
+++ b/drivers/ata/libata-zpodd.c
@@ -150,6 +150,7 @@ void zpodd_on_suspend(struct ata_device *dev)
if (!zpready(dev)) {
zpodd->zp_sampled = false;
+ zpodd->zp_ready = false;
return;
}