X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=block%2Fgenhd.c;h=53a931b30d788f0710fd519b687c090d1075a977;hb=refs%2Fheads%2F10;hp=a87e7762650433fcd82f92c16b4b614e63e9dee9;hpb=349ac1a59cff621947982c774d97e0faf5365435;p=sagit-ice-cold%2Fkernel_xiaomi_msm8998.git

diff --git a/block/genhd.c b/block/genhd.c
index a87e77626504..53a931b30d78 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -611,7 +611,7 @@ void add_disk(struct gendisk *disk)
 	disk_alloc_events(disk);
 
 	/* Register BDI before referencing it from bdev */
-	bdi = &disk->queue->backing_dev_info;
+	bdi = disk->queue->backing_dev_info;
 	bdi_register_owner(bdi, disk_to_dev(disk));
 
 	blk_register_region(disk_devt(disk), disk->minors, NULL,
@@ -646,6 +646,8 @@ void del_gendisk(struct gendisk *disk)
 	disk_part_iter_init(&piter, disk,
 			     DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
 	while ((part = disk_part_iter_next(&piter))) {
+		bdev_unhash_inode(MKDEV(disk->major,
+					disk->first_minor + part->partno));
 		invalidate_partition(disk, part->partno);
 		delete_partition(disk, part->partno);
 	}
@@ -656,7 +658,16 @@ void del_gendisk(struct gendisk *disk)
 	disk->flags &= ~GENHD_FL_UP;
 
 	sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");
-	blk_unregister_queue(disk);
+	if (disk->queue) {
+		/*
+		 * Unregister bdi before releasing device numbers (as they can
+		 * get reused and we'd get clashes in sysfs).
+		 */
+		bdi_unregister(disk->queue->backing_dev_info);
+		blk_unregister_queue(disk);
+	} else {
+		WARN_ON(1);
+	}
 	blk_unregister_region(disk_devt(disk), disk->minors);
 
 	part_stat_set_all(&disk->part0, 0);