Am 28.07.20 um 20:27 schrieb Felix Kuehling:
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 <[email protected]>
Tested-by: Laurent Morichetti <[email protected]>
Reviewed-by: Christian König <[email protected]>
Going to pick that up for inclusion in drm-misc-next.
---
drivers/gpu/drm/ttm/ttm_bo_vm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 389128b8c4dd..60b41447bec8 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -405,8 +405,10 @@ 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)
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