cciss: Rearrange logical drive sysfs code to make the "changing a disk" path work.

Rearrange logical drive sysfs code to make the "changing a disk" path work.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

drivers/block/cciss.c

@@ -1916,9 +1916,10 @@ static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
 		}
 	}
 	h->drv[drv_index].LunID = lunid;
-	if (cciss_create_ld_sysfs_entry(h, drv_index))
-		goto err_free_disk;
-
+	if (h->drv[drv_index].dev == NULL) {
+		if (cciss_create_ld_sysfs_entry(h, drv_index))
+			goto err_free_disk;
+	}
 	/* Don't need to mark this busy because nobody */
 	/* else knows about this disk yet to contend */
 	/* for access to it. */
@@ -2145,8 +2146,10 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
 	 */
 	if (h->gendisk[0] != disk) {
 		struct request_queue *q = disk->queue;
-		if (disk->flags & GENHD_FL_UP)
+		if (disk->flags & GENHD_FL_UP) {
+			cciss_destroy_ld_sysfs_entry(h, drv_index);
 			del_gendisk(disk);
+		}
 		if (q) {
 			blk_cleanup_queue(q);
 			/* Set drv->queue to NULL so that we do not try
@@ -2190,7 +2193,6 @@ static int deregister_disk(ctlr_info_t *h, int drv_index,
 				 * indicate that this element of the drive
 				 * array is free.
 				 */
-	cciss_destroy_ld_sysfs_entry(h, drv_index);
 
 	if (clear_all) {
 		/* check to see if it was the last disk */
@@ -4308,15 +4310,13 @@ static void __devexit cciss_remove_one(struct pci_dev *pdev)
 		if (disk) {
 			struct request_queue *q = disk->queue;
 
-			if (disk->flags & GENHD_FL_UP)
+			if (disk->flags & GENHD_FL_UP) {
+				cciss_destroy_ld_sysfs_entry(hba[i], j);
 				del_gendisk(disk);
+			}
 			if (q)
 				blk_cleanup_queue(q);
 		}
-		if (hba[i]->drv[j].dev != NULL &&
-			(j == 0 || hba[i]->drv[j].raid_level != -1))
-				cciss_destroy_ld_sysfs_entry(hba[i], j);
-
 	}
 
 #ifdef CONFIG_CISS_SCSI_TAPE