diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index baf5a9ce2b25c8..844c4be11768d3 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -978,7 +978,7 @@ static void writecache_resume(struct dm_target *ti)
 
 	wc_lock(wc);
 
-	wc->data_device_sectors = i_size_read(wc->dev->bdev->bd_inode) >> SECTOR_SHIFT;
+	wc->data_device_sectors = bdev_nr_sectors(wc->dev->bdev);
 
 	if (WC_MODE_PMEM(wc)) {
 		persistent_memory_invalidate_cache(wc->memory_map, wc->memory_map_size);