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drm/ttm: fix offset in VMAs with a pg_offs in ttm_bo_vm_access
[ 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:
parent
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1 changed files with 3 additions and 1 deletions
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@ -358,8 +358,10 @@ static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo,
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static int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
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void *buf, int len, int write)
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{
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unsigned long offset = (addr) - vma->vm_start;
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struct ttm_buffer_object *bo = vma->vm_private_data;
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unsigned long offset = (addr) - vma->vm_start +
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((vma->vm_pgoff - drm_vma_node_start(&bo->base.vma_node))
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<< PAGE_SHIFT);
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int ret;
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if (len < 1 || (offset + len) >> PAGE_SHIFT > bo->num_pages)
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