77     int fd, ret = 0;  in iommufd_backend_connect()  local
83             ret = fd;  in iommufd_backend_connect()
91                                   be->users, ret);  in iommufd_backend_connect()
92     return ret;  in iommufd_backend_connect()
112     int ret, fd = be->fd;  in iommufd_backend_alloc_ioas()  local
118     ret = ioctl(fd, IOMMU_IOAS_ALLOC, &alloc_data);  in iommufd_backend_alloc_ioas()
119     if (ret) {  in iommufd_backend_alloc_ioas()
121         return ret;  in iommufd_backend_alloc_ioas()
125     trace_iommufd_backend_alloc_ioas(fd, *ioas_id, ret);  in iommufd_backend_alloc_ioas()
127     return ret;  in iommufd_backend_alloc_ioas()
132     int ret, fd = be->fd;  in iommufd_backend_free_id()  local
138     ret = ioctl(fd, IOMMU_DESTROY, &des);  in iommufd_backend_free_id()
139     trace_iommufd_backend_free_id(fd, id, ret);  in iommufd_backend_free_id()
140     if (ret) {  in iommufd_backend_free_id()
148     int ret, fd = be->fd;  in iommufd_backend_map_dma()  local
164     ret = ioctl(fd, IOMMU_IOAS_MAP, &map);  in iommufd_backend_map_dma()
166                                   vaddr, readonly, ret);  in iommufd_backend_map_dma()
167     if (ret) {  in iommufd_backend_map_dma()
168         ret = -errno;  in iommufd_backend_map_dma()
177     return ret;  in iommufd_backend_map_dma()
183     int ret, fd = be->fd;  in iommufd_backend_unmap_dma()  local
191     ret = ioctl(fd, IOMMU_IOAS_UNMAP, &unmap);  in iommufd_backend_unmap_dma()
200     if (ret && errno == ENOENT) {  in iommufd_backend_unmap_dma()
201         trace_iommufd_backend_unmap_dma_non_exist(fd, ioas_id, iova, size, ret);  in iommufd_backend_unmap_dma()
202         ret = 0;  in iommufd_backend_unmap_dma()
204         trace_iommufd_backend_unmap_dma(fd, ioas_id, iova, size, ret);  in iommufd_backend_unmap_dma()
207     if (ret) {  in iommufd_backend_unmap_dma()
208         ret = -errno;  in iommufd_backend_unmap_dma()
211     return ret;  in iommufd_backend_unmap_dma()