diff options
Diffstat (limited to 'linux-core/via_dmablit.c')
| -rw-r--r-- | linux-core/via_dmablit.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/linux-core/via_dmablit.c b/linux-core/via_dmablit.c index b6e3e4f5..6e04cb57 100644 --- a/linux-core/via_dmablit.c +++ b/linux-core/via_dmablit.c @@ -74,7 +74,7 @@ via_unmap_blit_from_device(struct pci_dev *pdev, drm_via_sg_info_t *vsg) desc_ptr = vsg->desc_pages[cur_descriptor_page] + descriptor_this_page; } - dma_unmap_single(&pdev->dev, next, sizeof(*desc_ptr), DMA_FROM_DEVICE); + dma_unmap_single(&pdev->dev, next, sizeof(*desc_ptr), DMA_TO_DEVICE); dma_unmap_page(&pdev->dev, desc_ptr->mem_addr, desc_ptr->size, vsg->direction); next = (dma_addr_t) desc_ptr->next; desc_ptr--; @@ -595,11 +595,17 @@ via_build_sg_info(drm_device_t *dev, drm_via_sg_info_t *vsg, drm_via_dmablit_t * * (Not a big limitation anyway.) */ - if ((xfer->mem_stride - xfer->line_length) >= PAGE_SIZE) { + if (((xfer->mem_stride - xfer->line_length) >= PAGE_SIZE) || + (xfer->mem_stride > 2048)) { DRM_ERROR("Too large system memory stride.\n"); return DRM_ERR(EINVAL); } + if (xfer->num_lines > 2048) { + DRM_ERROR("Too many PCI DMA bitblt lines.\n"); + return DRM_ERR(EINVAL); + } + /* * we allow a negative fb stride to allow flipping of images in * transfer. @@ -617,11 +623,18 @@ via_build_sg_info(drm_device_t *dev, drm_via_sg_info_t *vsg, drm_via_dmablit_t * * about this. Meanwhile, impose the following restrictions: */ +#ifdef VIA_BUGFREE if ((((unsigned long)xfer->mem_addr & 3) != ((unsigned long)xfer->fb_addr & 3)) || ((xfer->mem_stride & 3) != (xfer->fb_stride & 3))) { DRM_ERROR("Invalid DRM bitblt alignment.\n"); return DRM_ERR(EINVAL); } +#else + if ((((unsigned long)xfer->mem_addr & 15) || ((unsigned long)xfer->fb_addr & 15))) { + DRM_ERROR("Invalid DRM bitblt alignment.\n"); + return DRM_ERR(EINVAL); + } +#endif if (0 != (ret = via_lock_all_dma_pages(vsg, xfer))) { DRM_ERROR("Could not lock DMA pages.\n"); |