From 7cb3cfc030640bf860bf8299aa00cdffff92a40c Mon Sep 17 00:00:00 2001 From: Daniel Phillips Date: Wed, 1 Mar 2023 14:28:26 -0800 Subject: [PATCH] amdkfd: Memory availability can never be negative Our assumptions about how much KFD memory is currently available for allocation may be violated by various complexities so we define the reported value as advisory, however we should never report negative availability. Signed-off-by: Daniel Phillips Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c index a4ee9f0378c1d..c87515210c4f4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c @@ -1583,7 +1583,7 @@ size_t amdgpu_amdkfd_get_available_memory(struct amdgpu_device *adev) { uint64_t reserved_for_pt = ESTIMATE_PT_SIZE(amdgpu_amdkfd_total_mem_size); - size_t available; + ssize_t available; spin_lock(&kfd_mem_limit.mem_limit_lock); available = adev->gmc.real_vram_size @@ -1592,6 +1592,9 @@ size_t amdgpu_amdkfd_get_available_memory(struct amdgpu_device *adev) - reserved_for_pt; spin_unlock(&kfd_mem_limit.mem_limit_lock); + if (available < 0) + available = 0; + return ALIGN_DOWN(available, VRAM_AVAILABLITY_ALIGN); } -- 2.30.2