[SCSI] scsi_debug: Convert to use root_device_register() and root_device_unregister()

This patch updates the scsi_debug virtual LLD to use
root_device_register() and root_device_unregister() from
include/linux/device.h instead of device_register() and
device_unregister() respectively within scsi_debug_init() and
scsi_debug_exit() This simply involved converting the static struct
device pseudo_primary into a pointer that is setup by the call to
root_device_register().

This patch also contains the correct IS_ERR() conditional check of
root_device_register() from within scsi_debug_init().

Thanks to Richard Sharpe and Dmitry Torokhov for their help with this
item.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 8 insertions, 17 deletions

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 06329d47b38..2c36bae3bd4 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -3226,16 +3226,7 @@ static void do_remove_driverfs_files(void)
         driver_remove_file(&sdebug_driverfs_driver, &driver_attr_add_host);
 }
 
-static void pseudo_0_release(struct device *dev)
-{
-        if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
-                printk(KERN_INFO "scsi_debug: pseudo_0_release() called\n");
-}
-
-static struct device pseudo_primary = {
-        .init_name      = "pseudo_0",
-        .release        = pseudo_0_release,
-};
+struct device *pseudo_primary;
 
 static int __init scsi_debug_init(void)
 {
@@ -3382,10 +3373,10 @@ static int __init scsi_debug_init(void)
                         map_region(0, 2);
         }
 
-        ret = device_register(&pseudo_primary);
-        if (ret < 0) {
-                printk(KERN_WARNING "scsi_debug: device_register error: %d\n",
-                        ret);
+        pseudo_primary = root_device_register("pseudo_0");
+        if (IS_ERR(pseudo_primary)) {
+                printk(KERN_WARNING "scsi_debug: root_device_register() error\n");
+                ret = PTR_ERR(pseudo_primary);
                 goto free_vm;
         }
         ret = bus_register(&pseudo_lld_bus);
@@ -3432,7 +3423,7 @@ del_files:
 bus_unreg:
         bus_unregister(&pseudo_lld_bus);
 dev_unreg:
-        device_unregister(&pseudo_primary);
+        root_device_unregister(pseudo_primary);
 free_vm:
         if (map_storep)
                 vfree(map_storep);
@@ -3453,7 +3444,7 @@ static void __exit scsi_debug_exit(void)
         do_remove_driverfs_files();
         driver_unregister(&sdebug_driverfs_driver);
         bus_unregister(&pseudo_lld_bus);
-        device_unregister(&pseudo_primary);
+        root_device_unregister(pseudo_primary);
 
         if (dif_storep)
                 vfree(dif_storep);
@@ -3504,7 +3495,7 @@ static int sdebug_add_adapter(void)
         spin_unlock(&sdebug_host_list_lock);
 
         sdbg_host->dev.bus = &pseudo_lld_bus;
-        sdbg_host->dev.parent = &pseudo_primary;
+        sdbg_host->dev.parent = pseudo_primary;
         sdbg_host->dev.release = &sdebug_release_adapter;
         dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);