The subject is wrong, nothing x86-specific here. Please use "swiotlb: " as the prefix > + * @vaddr: The vaddr of the swiotlb memory pool. The swiotlb > + * memory pool may be remapped in the memory encrypted case and store Please avoid the overly long line. > + /* > + * With swiotlb_unencrypted_base setting, swiotlb bounce buffer will > + * be remapped in the swiotlb_update_mem_attributes() and return here > + * directly. > + */ I'd word this as: /* * If swiotlb_unencrypted_base is set, the bounce buffer memory will * be remapped and cleared in swiotlb_update_mem_attributes. */ > + ret = swiotlb_init_io_tlb_mem(mem, __pa(tlb), nslabs, false); > + if (ret) { > + memblock_free(mem->slots, alloc_size); > + return ret; > + } With the latest update swiotlb_init_io_tlb_mem will always return 0, so no need for the return value change or error handling here.