[PATCH] drm/amdgpu: fix ring timeout issue in gfx10 sr-iov environment

[Alex Deucher]

On Tue, Jan 14, 2025 at 5:32 AM Lin.Cao <lincao12 at amd.com> wrote:
>
> 'commit 6e66dc05b54f ("drm/amdgpu: set the VM pointer to NULL in
> amdgpu_job_prepare")' set job->vm as NULL if there is no fence. It will
> cause emit switch buffer be skippen if job->vm set as NULL.
>
> Check job rather than vm could solve this problem.
>
> Signed-off-by: Lin.Cao <lincao12 at amd.com>

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

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
> index e0bc37557d2c..2ea98ec60220 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
> @@ -297,7 +297,7 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned int num_ibs,
>         amdgpu_ring_patch_cond_exec(ring, cond_exec);
>
>         ring->current_ctx = fence_ctx;
> -       if (vm && ring->funcs->emit_switch_buffer)
> +       if (job && ring->funcs->emit_switch_buffer)
>                 amdgpu_ring_emit_switch_buffer(ring);
>
>         if (ring->funcs->emit_wave_limit &&
> --
> 2.46.1
>