On Tue, Jun 4, 2019 at 11:44 AM Yintian Tao <yttao@xxxxxxx> wrote:
>
> We need reset compute ring wptr to zero when gpu reset
> in order to prevent CP hang.
>
> Signed-off-by: Yintian Tao <yttao@xxxxxxx>
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> index 2e9cac1..25211ba 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
> @@ -3175,6 +3175,7 @@ static int gfx_v9_0_kcq_init_queue(struct amdgpu_ring *ring)
>
> /* reset ring buffer */
> ring->wptr = 0;
> + amdgpu_ring_set_wptr(ring);
> amdgpu_ring_clear_ring(ring);
> } else {
> amdgpu_ring_clear_ring(ring);
> --
> 2.7.4
>
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