[SCSI] ibmvscsi: add slave_configure to allow device restart

Fixed the kernel-doc comment for ibmvscsi_slave_configure.  Thanks to
Randy Dunlap for pointing this out.

Adding a slave_configure function for the driver. Now the disks can be
restarted by the scsi mid-layer when the are disconnected and reconnected.

Signed-off-by: "Robert Jennings" <rcj@linux.vnet.ibm.com>
Signed-off-by: "Santiago Leon" <santil@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 383f5948ba06..b10eefe735c5 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -1354,6 +1354,27 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
         return rc;
 }
 
+/**
+ * ibmvscsi_slave_configure: Set the "allow_restart" flag for each disk.
+ * @sdev:       struct scsi_device device to configure
+ *
+ * Enable allow_restart for a device if it is a disk.  Adjust the
+ * queue_depth here also as is required by the documentation for
+ * struct scsi_host_template.
+ */
+static int ibmvscsi_slave_configure(struct scsi_device *sdev)
+{
+        struct Scsi_Host *shost = sdev->host;
+        unsigned long lock_flags = 0;
+
+        spin_lock_irqsave(shost->host_lock, lock_flags);
+        if (sdev->type == TYPE_DISK)
+                sdev->allow_restart = 1;
+        scsi_adjust_queue_depth(sdev, 0, shost->cmd_per_lun);
+        spin_unlock_irqrestore(shost->host_lock, lock_flags);
+        return 0;
+}
+
 /* ------------------------------------------------------------
  * sysfs attributes
  */
@@ -1499,6 +1520,7 @@ static struct scsi_host_template driver_template = {
         .queuecommand = ibmvscsi_queuecommand,
         .eh_abort_handler = ibmvscsi_eh_abort_handler,
         .eh_device_reset_handler = ibmvscsi_eh_device_reset_handler,
+        .slave_configure = ibmvscsi_slave_configure,
         .cmd_per_lun = 16,
         .can_queue = IBMVSCSI_MAX_REQUESTS_DEFAULT,
         .this_id = -1,