IDE: register ide driver for all ide drives; not just for disk drives.

  
This adds
      struct device_driver    gen_driver;
  
to ide_driver_t, which is filled in with necessary fields when an ide
driver calls ide_register_driver(). That then registers the driver with
the driver model core. 
  
As a result, this gives us the following output in driverfs:
  
# tree -d /sys/bus/ide/drivers/
/sys/bus/ide/drivers/
|-- ide-cdrom
`-- ide-disk
  
The suspend/resume callbacks in ide-disk.c have been temporarily
disabled until the ide core implements generic methods which forward
the calls to the drive drivers. 

drivers/ide/ide-disk.c

@@ -1664,14 +1664,6 @@ static int idedisk_resume(struct device *dev, u32 level)
 /* This is just a hook for the overall driver tree.
  */
 
-static struct device_driver idedisk_devdrv = {
-	.bus = &ide_bus_type,
-	.name = "IDE disk driver",
-
-	.suspend = idedisk_suspend,
-	.resume = idedisk_resume,
-};
-
 static int idedisk_ioctl (ide_drive_t *drive, struct inode *inode,
 	struct file *file, unsigned int cmd, unsigned long arg)
 {
@@ -1717,12 +1709,6 @@ static void idedisk_setup (ide_drive_t *drive)
 			drive->doorlocking = 1;
 		}
 	}
-	{
-		sprintf(drive->disk->disk_dev.name, "ide-disk");
-		drive->disk->disk_dev.driver = &idedisk_devdrv;
-		drive->disk->disk_dev.driver_data = drive;
-	}
-
 #if 1
 	(void) probe_lba_addressing(drive, 1);
 #else
@@ -1806,7 +1792,7 @@ static int idedisk_cleanup (ide_drive_t *drive)
 {
 	struct gendisk *g = drive->disk;
 
-	device_unregister(&drive->disk->disk_dev);
+	device_unregister(&drive->gendev);
 	if ((drive->id->cfs_enable_2 & 0x3000) && drive->wcache)
 		if (do_idedisk_flushcache(drive))
 			printk (KERN_INFO "%s: Write Cache FAILED Flushing!\n",
@@ -1905,7 +1891,6 @@ static void __exit idedisk_exit (void)
 static int idedisk_init (void)
 {
 	ide_register_driver(&idedisk_driver);
-	driver_register(&idedisk_devdrv);
 	return 0;
 }
 

drivers/ide/ide.c

@@ -3440,7 +3440,9 @@ int ide_register_driver(ide_driver_t *driver)
 		list_del_init(&drive->list);
 		ata_attach(drive);
 	}
-	return 0;
+	driver->gen_driver.name = driver->name;
+	driver->gen_driver.bus = &ide_bus_type;
+	return driver_register(&driver->gen_driver);
 }
 
 EXPORT_SYMBOL(ide_register_driver);

include/linux/ide.h

@@ -1200,6 +1200,7 @@ typedef struct ide_driver_s {
 	int		(*attach)(ide_drive_t *);
 	void		(*ata_prebuilder)(ide_drive_t *);
 	void		(*atapi_prebuilder)(ide_drive_t *);
+	struct device_driver	gen_driver;
 	struct list_head drives;
 	struct list_head drivers;
 } ide_driver_t;