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drm/amdgpu: clear set_q_mode_offs when VM changed

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[Why]
set_q_mode_offs don't get cleared after GPU reset, nexting SET_Q_MODE
packet to init shadow memory will be skiped, hence there has a page fault.

[How]
VM flush is needed after GPU reset, clear set_q_mode_offs when
emitting VM flush.

Fixes: 8bc75586ea01 ("drm/amdgpu: workaround to avoid SET_Q_MODE packets v2")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: ZhenGuo Yin <zhenguo.yin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
ZhenGuo Yin 2024-04-02 11:41:05 +08:00 committed by Alex Deucher
parent f7e232de51
commit e33997e18d
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
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@ -5465,6 +5465,7 @@ static void gfx_v11_0_ring_emit_vm_flush(struct amdgpu_ring *ring,
/* Make sure that we can't skip the SET_Q_MODE packets when the VM
* changed in any way.
*/
ring->set_q_mode_offs = 0;
ring->set_q_mode_ptr = NULL;
}