diff options
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/swiotlb-xen.c | 25 |
1 files changed, 12 insertions, 13 deletions
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 58db6df866ef..af47e7594460 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -338,9 +338,8 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, enum dma_data_direction dir, struct dma_attrs *attrs) { - phys_addr_t phys = page_to_phys(page) + offset; + phys_addr_t map, phys = page_to_phys(page) + offset; dma_addr_t dev_addr = xen_phys_to_bus(phys); - void *map; BUG_ON(dir == DMA_NONE); /* @@ -356,10 +355,10 @@ dma_addr_t xen_swiotlb_map_page(struct device *dev, struct page *page, * Oh well, have to allocate and map a bounce buffer. */ map = swiotlb_tbl_map_single(dev, start_dma_addr, phys, size, dir); - if (!map) + if (map == SWIOTLB_MAP_ERROR) return DMA_ERROR_CODE; - dev_addr = xen_virt_to_bus(map); + dev_addr = xen_phys_to_bus(map); /* * Ensure that the address returned is DMA'ble @@ -389,7 +388,7 @@ static void xen_unmap_single(struct device *hwdev, dma_addr_t dev_addr, /* NOTE: We use dev_addr here, not paddr! */ if (is_xen_swiotlb_buffer(dev_addr)) { - swiotlb_tbl_unmap_single(hwdev, phys_to_virt(paddr), size, dir); + swiotlb_tbl_unmap_single(hwdev, paddr, size, dir); return; } @@ -434,8 +433,7 @@ xen_swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr, /* NOTE: We use dev_addr here, not paddr! */ if (is_xen_swiotlb_buffer(dev_addr)) { - swiotlb_tbl_sync_single(hwdev, phys_to_virt(paddr), size, dir, - target); + swiotlb_tbl_sync_single(hwdev, paddr, size, dir, target); return; } @@ -494,11 +492,12 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, if (swiotlb_force || !dma_capable(hwdev, dev_addr, sg->length) || range_straddles_page_boundary(paddr, sg->length)) { - void *map = swiotlb_tbl_map_single(hwdev, - start_dma_addr, - sg_phys(sg), - sg->length, dir); - if (!map) { + phys_addr_t map = swiotlb_tbl_map_single(hwdev, + start_dma_addr, + sg_phys(sg), + sg->length, + dir); + if (map == SWIOTLB_MAP_ERROR) { /* Don't panic here, we expect map_sg users to do proper error handling. */ xen_swiotlb_unmap_sg_attrs(hwdev, sgl, i, dir, @@ -506,7 +505,7 @@ xen_swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, sgl[0].dma_length = 0; return DMA_ERROR_CODE; } - sg->dma_address = xen_virt_to_bus(map); + sg->dma_address = xen_phys_to_bus(map); } else sg->dma_address = dev_addr; sg->dma_length = sg->length; |