Hi Wentao,
We need to check psp firmware version here instead of to change
psp_ring_destroy to psp_ring_stop.
Best wishes
Emily Deng
>-Original Message-
>From: amd-gfx On Behalf Of Yu,
>Xiangliang
>Sent: Tuesday, December 18, 2018 3:58 PM
>To: Lou, Wentao ; amd-gfx@lists.freedesktop.org
>Subject: RE: [PATCH] drm/amdgpu: psp_ring_destroy cause psp-
>>km_ring.ring_mem NULL
>
>Reviewed-by: Xiangliang Yu
>
>
>
>-Original Message-
>From: Lou, Wentao
>Sent: Tuesday, December 18, 2018 3:52 PM
>To: amd-gfx@lists.freedesktop.org
>Cc: Lou, Wentao
>Subject: [PATCH] drm/amdgpu: psp_ring_destroy cause psp->km_ring.ring_mem
>NULL
>
>psp_ring_destroy inside psp_load_fw cause psp->km_ring.ring_mem NULL.
>Call Trace occurred when psp_cmd_submit.
>should be psp_ring_stop instead.
>
>Change-Id: Ib332004b3b9edc9e002adc532b2d45cdad929b05
>Signed-off-by: Wentao Lou
>---
> drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>index 7f5ce37..8189a90 100644
>--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
>@@ -547,7 +547,7 @@ static int psp_load_fw(struct amdgpu_device *adev)
> struct psp_context *psp = >psp;
>
> if (amdgpu_sriov_vf(adev) && adev->in_gpu_reset) {
>- psp_ring_destroy(psp, PSP_RING_TYPE__KM);
>+ psp_ring_stop(psp, PSP_RING_TYPE__KM); /* should not destroy
>ring, only stop */
> goto skip_memalloc;
> }
>
>--
>2.7.4
>
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