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[SCSI] hpsa: add hp_ssd_smart_path_enabled sysfs attribute 

Signed-off-by: Scott Teel <scott.teel@hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Scott Teel 2014-02-18 13:55:54 -06:00 committed by James Bottomley
parent 5f38936055
commit c1988684bb
1 changed files with 25 additions and 0 deletions
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25
drivers/scsi/hpsa.c
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@ -508,10 +508,34 @@ static ssize_t unique_id_show(struct device *dev,
sn[12], sn[13], sn[14], sn[15]);
}
static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ctlr_info *h;
struct scsi_device *sdev;
struct hpsa_scsi_dev_t *hdev;
unsigned long flags;
int offload_enabled;
sdev = to_scsi_device(dev);
h = sdev_to_hba(sdev);
spin_lock_irqsave(&h->lock, flags);
hdev = sdev->hostdata;
if (!hdev) {
spin_unlock_irqrestore(&h->lock, flags);
return -ENODEV;
}
offload_enabled = hdev->offload_enabled;
spin_unlock_irqrestore(&h->lock, flags);
return snprintf(buf, 20, "%d\n", offload_enabled);
}
static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
host_show_hp_ssd_smart_path_enabled, NULL);
static DEVICE_ATTR(firmware_revision, S_IRUGO,
host_show_firmware_revision, NULL);
static DEVICE_ATTR(commands_outstanding, S_IRUGO,
@ -525,6 +549,7 @@ static struct device_attribute *hpsa_sdev_attrs[] = {
&dev_attr_raid_level,
&dev_attr_lunid,
&dev_attr_unique_id,
&dev_attr_hp_ssd_smart_path_enabled,
NULL,
};