1 files changed, 39 insertions, 2 deletions

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index a48782866b22..758598ff3b90 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -771,6 +771,8 @@ sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr,
         if (retval < 0)
                 return retval;
 
+        sdev->max_queue_depth = sdev->queue_depth;
+
         return count;
 }
 
@@ -779,6 +781,37 @@ static struct device_attribute sdev_attr_queue_depth_rw =
                sdev_store_queue_depth_rw);
 
 static ssize_t
+sdev_show_queue_ramp_up_period(struct device *dev,
+                               struct device_attribute *attr,
+                               char *buf)
+{
+        struct scsi_device *sdev;
+        sdev = to_scsi_device(dev);
+        return snprintf(buf, 20, "%u\n",
+                        jiffies_to_msecs(sdev->queue_ramp_up_period));
+}
+
+static ssize_t
+sdev_store_queue_ramp_up_period(struct device *dev,
+                                struct device_attribute *attr,
+                                const char *buf, size_t count)
+{
+        struct scsi_device *sdev = to_scsi_device(dev);
+        unsigned long period;
+
+        if (strict_strtoul(buf, 10, &period))
+                return -EINVAL;
+
+        sdev->queue_ramp_up_period = msecs_to_jiffies(period);
+        return period;
+}
+
+static struct device_attribute sdev_attr_queue_ramp_up_period =
+        __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
+               sdev_show_queue_ramp_up_period,
+               sdev_store_queue_ramp_up_period);
+
+static ssize_t
 sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr,
                          const char *buf, size_t count)
 {
@@ -866,8 +899,12 @@ int scsi_sysfs_add_sdev(struct scsi_device *sdev)
         }
 
         /* create queue files, which may be writable, depending on the host */
-        if (sdev->host->hostt->change_queue_depth)
-                error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_depth_rw);
+        if (sdev->host->hostt->change_queue_depth) {
+                error = device_create_file(&sdev->sdev_gendev,
+                                           &sdev_attr_queue_depth_rw);
+                error = device_create_file(&sdev->sdev_gendev,
+                                           &sdev_attr_queue_ramp_up_period);
+        }
         else
                 error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth);
         if (error) {