[PATCH v6 21/22] drm/virtio: Return proper error codes instead of -1

[Dmitry Osipenko]

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.osipe...@collabora.com>
---
 drivers/gpu/drm/virtio/virtgpu_vq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c 
b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 2a04dad1ae89..40402367d593 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -320,7 +320,7 @@ 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)
@@ -384,7 +384,7 @@ 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;
@@ -750,7 +750,7 @@ 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;
 }
-- 
2.35.3