[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>

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 67e059cd9e57ca9a5b3ee49ff1ec751b5f090592..bbdd8bed42661d10d83da70f964485fdb9be9f3e 100644 (file)
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -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,
 };