From 0bef0a6c2cb3b128af313c8c30a8a9385b64f944 Mon Sep 17 00:00:00 2001 From: Pierre-Eric Pelloux-Prayer Date: Thu, 6 Aug 2026 10:12:02 +0200 Subject: [PATCH] drm/amdgpu: prevent suspend in fault handler MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Temporarily increment the PM reference count during page handling to ensure the GPU does not enter a sleep state. v2 (Shahyan): Added commit description Signed-off-by: Pierre-Eric Pelloux-Prayer Signed-off-by: Shahyan Soltani Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index e5babf801f29..3229a82e342e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -129,6 +129,8 @@ static vm_fault_t amdgpu_gem_fault(struct vm_fault *vmf) return ret; if (drm_dev_enter(ddev, &idx)) { + pm_runtime_get_noresume(ddev->dev); + ret = amdgpu_bo_fault_reserve_notify(bo); if (ret) { drm_dev_exit(idx); @@ -138,6 +140,7 @@ static vm_fault_t amdgpu_gem_fault(struct vm_fault *vmf) ret = ttm_bo_vm_fault_reserved(vmf, vmf->vma->vm_page_prot, TTM_BO_VM_NUM_PREFAULT); + pm_runtime_put_noidle(ddev->dev); drm_dev_exit(idx); } else { ret = ttm_bo_vm_dummy_page(vmf, vmf->vma->vm_page_prot);