[PATCH] drm/amdgpu/gfx9: reset compute ring wptr when gpu reset

[Alex Deucher]

On Tue, Jun 4, 2019 at 11:44 AM Yintian Tao <yttao at amd.com> wrote:
>
> We need reset compute ring wptr to zero when gpu reset
> in order to prevent CP hang.
>
> Signed-off-by: Yintian Tao <yttao at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  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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