drm/virtio: Return proper error codes instead of -1

Don't return -1 in error cases, return proper error code. The returned
error codes propagate to error messages and to userspace and it's always
good to have a meaningful error number for debugging purposes.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220630200726.1884320-10-dmitry.osipenko@collabora.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index ee84256..9ff8660 100644 (file)
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -322,7 +322,7 @@ static int virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,
                if (fence && vbuf->objs)
                        virtio_gpu_array_unlock_resv(vbuf->objs);
                free_vbuf(vgdev, vbuf);
-               return -1;
+               return -ENODEV;
        }
 
        if (vgdev->has_indirect)
@@ -386,7 +386,7 @@ static int virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
                        if (!sgt) {
                                if (fence && vbuf->objs)
                                        virtio_gpu_array_unlock_resv(vbuf->objs);
-                               return -1;
+                               return -ENOMEM;
                        }
 
                        elemcnt += sg_ents;
@@ -720,7 +720,7 @@ static int virtio_get_edid_block(void *data, u8 *buf,
        size_t start = block * EDID_LENGTH;
 
        if (start + len > le32_to_cpu(resp->size))
-               return -1;
+               return -EINVAL;
        memcpy(buf, resp->edid + start, len);
        return 0;
 }