On 2021-03-29 20:10 +0200, Christian König wrote:
You need to identify the root cause of this, most likely start or last are not a multiple of AMDGPU_GPU_PAGES_IN_CPU_PAGE.
I printk'ed the value of start & last, they are all a multiple of 4 (AMDGPU_GPU_PAGES_IN_CPU_PAGE).
However... `num_entries = last - start + 1` so it became some irrational thing... Either this line is wrong, or someone called amdgpu_vm_bo_update_mapping with [start, last) instead of [start, last], which is unexpected.
BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1549 Fixes: a39f2a8d7066 ("drm/amdgpu: nuke amdgpu_vm_bo_split_mapping v2") Reported-by: Xi Ruoyao xry111@mengyan1223.wang Reported-by: Dan Horák dan@danny.cz Cc: stable@vger.kernel.org Signed-off-by: Xi Ruoyao xry111@mengyan1223.wang
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index ad91c0c3c423..cee0cc9c8085 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1707,7 +1707,7 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, } start = tmp; - } while (unlikely(start != last + 1)); + } while (unlikely(start < last + 1)); r = vm->update_funcs->commit(¶ms, fence);
base-commit: a5e13c6df0e41702d2b2c77c8ad41677ebb065b3