[PATCH 5.15.y 1/2] drm/virtio: Return proper error codes instead of -1

From: Dmitry Osipenko <[email protected]>

[ Upstream commit 4c703f5d6f776eaa6a98611c9b5dfe800fbeb0c8 ]

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 <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Gerd Hoffmann <[email protected]>
Stable-dep-of: 4e1a53892ba7 ("drm/virtio: bound EDID block reads to the response buffer")
Signed-off-by: Sasha Levin <[email protected]>
---
 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 19a196b48a38..65c31fc4e7d3 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -329,7 +329,7 @@ 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)
@@ -393,7 +393,7 @@ 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;
@@ -728,7 +728,7 @@ 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;
 }
-- 
2.53.0