Re: [PATCH RFC v2 5/5] drm/virtio: add VIRTGPU_PARAM_HOST_SHM_PAGE_SIZE to params

[Sergio Lopez Pascual <slp@xxxxxxxxxx>]

Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx> writes:

> On 2/14/25 18:16, Sergio Lopez wrote:
>> diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
>> index c33c057365f85a2ace536f91655c903036827312..4b49635b4fe1d4256f219823341cef8e5fa8f029 100644
>> --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
>> +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
>> @@ -117,6 +117,11 @@ static int virtio_gpu_getparam_ioctl(struct drm_device *dev, void *data,
>>  	case VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME:
>>  		value = vgdev->has_context_init ? 1 : 0;
>>  		break;
>> +	case VIRTGPU_PARAM_HOST_SHM_PAGE_SIZE:
>> +		if (!vgdev->has_host_visible)
>> +			return -EINVAL;
>
> Nit: virtio_gpu_getparam_ioctl() returns EINVAL for unsupported params.
> While this is a supported param, but there is no hostmem available.
> Hence, should a different error code, maybe ENOENT or ENXIO.

Good point. I'll update it to return ENOENT in v3.

Thanks,
Sergio.