From: Felix Kuehling Date: Tue, 28 Jul 2020 18:27:04 +0000 (-0400) Subject: drm/ttm: fix offset in VMAs with a pg_offs in ttm_bo_vm_access X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c0001213d195d1bac83e0744c06ff06dd5a8ba53;p=linux.git drm/ttm: fix offset in VMAs with a pg_offs in ttm_bo_vm_access VMAs with a pg_offs that's offset from the start of the vma_node need to adjust the offset within the BO accordingly. This matches the offset calculation in ttm_bo_vm_fault_reserved. Signed-off-by: Felix Kuehling Tested-by: Laurent Morichetti Signed-off-by: Christian König Link: https://patchwork.freedesktop.org/patch/381169/ --- diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c index fa03fab02076d..33526c5df0e8c 100644 --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c @@ -505,8 +505,10 @@ static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo, int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr, void *buf, int len, int write) { - unsigned long offset = (addr) - vma->vm_start; struct ttm_buffer_object *bo = vma->vm_private_data; + unsigned long offset = (addr) - vma->vm_start + + ((vma->vm_pgoff - drm_vma_node_start(&bo->base.vma_node)) + << PAGE_SHIFT); int ret; if (len < 1 || (offset + len) >> PAGE_SHIFT > bo->num_pages)