device: return errors from ipc scanner

The code as written will drop any read errors on the floor.
Fix that.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>

diff --git a/device/uapi.go b/device/uapi.go
index 370ad4eb8e337cac1bd66836f6e03262069f22d9..dbb60b686fa97b06528a16d06fe28ec7ec18d7be 100644 (file)
--- a/device/uapi.go
+++ b/device/uapi.go
@@ -393,7 +393,7 @@ func (device *Device) IpcSetOperation(r io.Reader) error {
                }
        }
 
-       return nil
+       return scanner.Err()
 }
 
 func (device *Device) IpcGet() (string, error) {