From 2e34be59854020f8e0bb451588bda0eeb731dc20 Mon Sep 17 00:00:00 2001 From: Felix Kuehling Date: Thu, 22 Jun 2017 15:04:01 -0400 Subject: [PATCH 0842/4131] drm/amdgpu: Fix non-contig ptrace VRAM access crossing nodes Fix ptrace VRAM access when crossing non-contiguous VRAM node boundaries. Change-Id: I9c876145d0087a78fc17f0a76b9ac47f55a4f35b Signed-off-by: Felix Kuehling --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 57904b9..94e7611 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1617,6 +1617,10 @@ static int amdgpu_ttm_bo_access_vram(struct amdgpu_bo *abo, buf = (uint8_t *)buf + bytes; pos += bytes; len -= bytes; + if (pos >= (nodes->start + nodes->size) << PAGE_SHIFT) { + ++nodes; + pos = (nodes->start << PAGE_SHIFT); + } } return result; -- 2.7.4