[PATCH] drm/amd: Fix a probing order problem on SDMA 2.4

[Alex Deucher]

On Tue, Dec 12, 2023 at 12:30 PM Mario Limonciello
<mario.limonciello at amd.com> wrote:
>
> commit 751e293f2c99 ("drm/amd: Move microcode init from sw_init to
> early_init for SDMA v2.4") made a fateful mistake in
> `adev->sdma.num_instances` wasn't declared when sdma_v2_4_init_microcode()
> was run. This caused probing to fail.
>
> Move the declaration to right before sdma_v2_4_init_microcode().
>
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3043
> Fixes: 751e293f2c99 ("drm/amd: Move microcode init from sw_init to early_init for SDMA v2.4")
> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>

FWIW, looks like cik_sdma.c and sdma_v3_0.c never switched their
microcode init to early init.

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

> ---
>  drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
> index 45377a175250..8d5d86675a7f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
> @@ -813,12 +813,12 @@ static int sdma_v2_4_early_init(void *handle)
>         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>         int r;
>
> +       adev->sdma.num_instances = SDMA_MAX_INSTANCE;
> +
>         r = sdma_v2_4_init_microcode(adev);
>         if (r)
>                 return r;
>
> -       adev->sdma.num_instances = SDMA_MAX_INSTANCE;
> -
>         sdma_v2_4_set_ring_funcs(adev);
>         sdma_v2_4_set_buffer_funcs(adev);
>         sdma_v2_4_set_vm_pte_funcs(adev);
> --
> 2.34.1
>