- cluster_size = (1 << bs->bsx.sect_per_clus_bits) * bd->sector_size;
- root_clu_off = le32_to_cpu(bs->bsx.clu_offset) * bd->sector_size +
- le32_to_cpu(bs->bsx.root_cluster - EXFAT_RESERVED_CLUSTERS)
- * cluster_size;
+ sector_size = 1 << bs->bsx.sect_size_bits;
+ cluster_size = (1 << bs->bsx.sect_per_clus_bits) * sector_size;
+ root_clu_off = le32_to_cpu(bs->bsx.clu_offset) * sector_size +
+ (le32_to_cpu(bs->bsx.root_cluster) - EXFAT_RESERVED_CLUSTERS) *
+ cluster_size;