[Nouveau] [PATCH] device: return error for unknown chipsets

[dann frazier]

On Mon, Oct 05, 2020 at 03:52:30PM +0200, Karol Herbst wrote:
> Previously the code relied on device->pri to be NULL and to fail probing
> later. We really should just return an error inside nvkm_device_ctor for
> unsupported GPUs.
> 
> Fixes: 24d5ff40a732 ("drm/nouveau/device: rework mmio mapping code to get rid of second map")
> Signed-off-by: Karol Herbst <kherbst at redhat.com>
> Cc: dann frazier <dann.frazier at canonical.com>

Thanks Karol! Got rid of the Oops for me.

Tested-by: dann frazier <dann.frazier at canonical.com>

Would it be appropriate to tag this for stable v5.8+?

  -dann

> ---
>  drm/nouveau/nvkm/engine/device/base.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drm/nouveau/nvkm/engine/device/base.c b/drm/nouveau/nvkm/engine/device/base.c
> index 9f4ac2672..68d665414 100644
> --- a/drm/nouveau/nvkm/engine/device/base.c
> +++ b/drm/nouveau/nvkm/engine/device/base.c
> @@ -3149,6 +3149,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
>  		case 0x168: device->chip = &nv168_chipset; break;
>  		default:
>  			nvdev_error(device, "unknown chipset (%08x)\n", boot0);
> +			ret = -ENOSYS;
>  			goto done;
>  		}
>