linux-kernel - Re: [PATCH v1] drm/virtio: Fix return value for VIRTGPU_CONTEXT_PARAM_DEBUG

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Date:   Wed, 15 Nov 2023 04:44:22 +0300
From:   Dmitry Osipenko <dmitry.osipenko@...labora.com>
To:     David Airlie <airlied@...hat.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Chia-I Wu <olvaffe@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH v1] drm/virtio: Fix return value for
 VIRTGPU_CONTEXT_PARAM_DEBUG_NAME

On 11/12/23 01:42, Dmitry Osipenko wrote:
> The strncpy_from_user() returns number of copied bytes and not zero on
> success. The non-zero return value of ioctl is treated as error. Return
> zero on success instead of the number of copied bytes.
> 
> Fixes: 7add80126bce ("drm/uapi: add explicit virtgpu context debug name")
> Signed-off-by: Dmitry Osipenko <dmitry.osipenko@...labora.com>
> ---
>  drivers/gpu/drm/virtio/virtgpu_ioctl.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> index 1e2042419f95..e4f76f315550 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
> @@ -665,6 +665,7 @@ static int virtio_gpu_context_init_ioctl(struct drm_device *dev,
>  				goto out_unlock;
>  
>  			vfpriv->explicit_debug_name = true;
> +			ret = 0;
>  			break;
>  		default:
>  			ret = -EINVAL;

Applied to misc-next

-- 
Best regards,
Dmitry