From: Christian König Date: Wed, 2 Sep 2020 09:07:14 +0000 (+0200) Subject: drm/amdgpu: fix max_entries calculation v4 X-Git-Tag: v5.10-rc1~123^2~23^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ee354ff1c7c210fb41952ebf0a820fb714eae7b1;p=thirdparty%2Flinux.git drm/amdgpu: fix max_entries calculation v4 Calculate the correct value for max_entries or we might run after the page_address array. v2: Xinhui pointed out we don't need the shift v3: use local copy of start and simplify some calculation v4: fix the case that we map less VA range than BO size Signed-off-by: Christian König Fixes: 1e691e244487 drm/amdgpu: stop allocating dummy GTT nodes Reviewed-by: xinhui pan Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 620472a70460a..37221b99ca960 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1693,13 +1693,13 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev, uint64_t max_entries; uint64_t addr, last; + max_entries = mapping->last - start + 1; if (nodes) { addr = nodes->start << PAGE_SHIFT; - max_entries = (nodes->size - pfn) * - AMDGPU_GPU_PAGES_IN_CPU_PAGE; + max_entries = min((nodes->size - pfn) * + AMDGPU_GPU_PAGES_IN_CPU_PAGE, max_entries); } else { addr = 0; - max_entries = S64_MAX; } if (pages_addr) { @@ -1729,7 +1729,7 @@ static int amdgpu_vm_bo_split_mapping(struct amdgpu_device *adev, addr += pfn << PAGE_SHIFT; } - last = min((uint64_t)mapping->last, start + max_entries - 1); + last = start + max_entries - 1; r = amdgpu_vm_bo_update_mapping(adev, vm, false, false, resv, start, last, flags, addr, dma_addr, fence);