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drm/ttm: fix offset in VMAs with a pg_offs in ttm_bo_vm_access

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[ Upstream commit c0001213d1 ]

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 <Felix.Kuehling@amd.com>
Tested-by: Laurent Morichetti <laurent.morichetti@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/381169/
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Felix Kuehling
2020-07-28 14:27:04 -04:00
committed by Greg Kroah-Hartman
parent 711f5688bb
commit 04aeb884e8
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/ttm/ttm_bo_vm.c
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@@ -358,8 +358,10 @@ static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo,
static 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)