Commit 892bac99 authored Jul 24, 2025 by Lijo Lazar Committed by Alex Deucher Aug 06, 2025

drm/amdgpu: Prevent hardware access in dpc state



Don't allow hardware access while in dpc state.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Ce Sun <cesun102@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

parent 1a0e57eb

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -6256,11 +6256,7 @@ static int amdgpu_device_asic_reset(struct amdgpu_device *adev,

		retry: /* Rest of adevs pre asic reset from XGMI hive. */
		list_for_each_entry(tmp_adev, device_list, reset_list) {
		if (amdgpu_reset_in_dpc(adev))
		tmp_adev->no_hw_access = true;
		r = amdgpu_device_pre_asic_reset(tmp_adev, reset_context);
		if (amdgpu_reset_in_dpc(adev))
		tmp_adev->no_hw_access = false;
		/TODO Should we stop ?/
		if (r) {
		dev_err(tmp_adev->dev, "GPU pre asic reset failed with err, %d for drm dev, %s ",

drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -164,6 +164,7 @@ static inline void amdgpu_reset_set_dpc_status(struct amdgpu_device *adev,
		bool status)
		{
		adev->pcie_reset_ctx.occurs_dpc = status;
		adev->no_hw_access = status;
		}

		static inline bool amdgpu_reset_in_dpc(struct amdgpu_device *adev)