am 808fa88b: Merge "readAt can return negative values (error codes)." into mnc-dev

            return UNKNOWN_ERROR;

        }

        size_t len = reply.readInt32();

        int32_t lenOrErrorCode = reply.readInt32();

        // Negative values are error codes

        if (lenOrErrorCode < 0) {

            return lenOrErrorCode;

        }

        size_t len = lenOrErrorCode;

        if (len > size) {

            ALOGE("requested %zu, got %zu", size, len);